Spotted these on eBay.
Alien Power Systems.
Controllers are for RC, but are supposed to work on bikes too. PC interface for settings.
Air cooled 420A 24s
http://www.ebay.co.uk/itm/420A-4-24S-ESC-Super-high-voltage-HV-brushless-speed-controller-E-bike-RC-/271080113006?pt=UK_ToysGames_RadioControlled_JN&hash=item3f1da2436e
Watercooled 420A 24s
http://www.ebay.co.uk/itm/420A-4-24S-Boat-ESC-Super-high-voltage-HV-brushless-speed-controller-/271082212933?pt=UK_ToysGames_RadioControlled_JN&hash=item3f1dc24e45
EDIT: Links are dead. New link:
http://alienpowersystem.com/product-category/esc/ev-esc/
EDIT 2013-11-22
420A Controller has been tested by liveforphysics!
http://endless-sphere.com/forums/viewtopic.php?p=825135#p825135
EDIT 2013-05-22:
Later in this thread a member gets a 420A controller after volunteering to make a proper test of it. The test has not been done yet. So if you read through the entire thread expecting to find the results of the test, there is a good chance that you will become frustrated, disappointed and start expressing that in different ways, which is what the later half of this thread currently contains.
Pictures of some hardware to be used during the test, and a discussion of how the test should be performed starts at the post linked below.
http://endless-sphere.com/forums/viewtopic.php?p=700565#p700565
If I'm still around when the test is made, I will add a link to it. If not, I'm sure a moderator will do it instead of me.
Some people have stated success of using different Alien controllers in practice, with both wheel hub motors and RC motors. I don't have the time/interest to find those posts and put the links here, but if someone hands me the links, I'll paste them here.
Alien Power Systems.
Controllers are for RC, but are supposed to work on bikes too. PC interface for settings.
I can supply 200, 250, 300, 350 and 400A, with a battery voltage from 2 to 24s Li po, with firmware for heli, boat, car or e-bike, and cooling system for air, street and boat.
If you require any customisation, such a different amp, power, different application, specific parts (capacitors, mosfeet ext.) then please ask as i can provide these.
Air cooled 420A 24s
http://www.ebay.co.uk/itm/420A-4-24S-ESC-Super-high-voltage-HV-brushless-speed-controller-E-bike-RC-/271080113006?pt=UK_ToysGames_RadioControlled_JN&hash=item3f1da2436e
Watercooled 420A 24s
http://www.ebay.co.uk/itm/420A-4-24S-Boat-ESC-Super-high-voltage-HV-brushless-speed-controller-/271082212933?pt=UK_ToysGames_RadioControlled_JN&hash=item3f1dc24e45
EDIT: Links are dead. New link:
http://alienpowersystem.com/product-category/esc/ev-esc/
EDIT 2013-11-22
420A Controller has been tested by liveforphysics!
http://endless-sphere.com/forums/viewtopic.php?p=825135#p825135
EDIT 2013-05-22:
Later in this thread a member gets a 420A controller after volunteering to make a proper test of it. The test has not been done yet. So if you read through the entire thread expecting to find the results of the test, there is a good chance that you will become frustrated, disappointed and start expressing that in different ways, which is what the later half of this thread currently contains.
Pictures of some hardware to be used during the test, and a discussion of how the test should be performed starts at the post linked below.
http://endless-sphere.com/forums/viewtopic.php?p=700565#p700565
If I'm still around when the test is made, I will add a link to it. If not, I'm sure a moderator will do it instead of me.
Some people have stated success of using different Alien controllers in practice, with both wheel hub motors and RC motors. I don't have the time/interest to find those posts and put the links here, but if someone hands me the links, I'll paste them here.