Sprockets that mount to disk rotor hole spacing on hub motor

[hagerty1]

Does anyone have a line on sprockets for # 40 chain that mount to the hole spacing on hub motors
that is set up to mount brake rotor? This hole spacing seems standard.I am using the 1.375 24TPI side
of the hub to mount a fixed sprocket with lock ring.I am using this sprocket as a driver not as a driven
so CW rotation wants to unscrew it, hence lock ring.
I need a secondary sprocket and there is not room for it on the 1.375 threaded side, and I don't want
to apply any more stress on this attachment as it wants to unscrew as it is.
I need to mount a 35T or so sprocket to the side where the rotor would go.
Anybody know somewhere to get these, without custom machining???
Any help would be great.
Thanks
Jim H.

 

[ferret]

I only found sprocket that bolt to the disk flange up to 22T:

http://problemsolversbike.com/products/singlespeed_cassette_cog_carrier
http://www.velosolo.co.uk/shopdisc.html


However, you can buy a BMX chainring like this one:

Then drill the 6 holes.
You will probably need to enlarge the center bore too.

 

[ddk]

http://www.amazon.com/COG-OR8-f6B-DISC-CASS-16Tx3/dp/B008ZTLVSS/ref=pd_sim_sg_5?ie=UTF8&refRID=1DQ1YXRWSA5S61N9NSEA

tl;dr
exactly what you want
...see page 32-34 of this thread for hidden details if you need