https://ebikes.ca/ - Top quality products with excellent customer service. Out of Vancouver, BC, Canada (West Coast)
https://www.leafbike.com/ - Leaf 1500W is a really good motor, excellent efficiency. Probably out of China
https://evfittinggreentime.aliexpress.com/store/313864 - I've had no problems with them. Out of China.
https://lunacycle.com/ - No hubs, out of California, USA
https://bmsbattery.com/ - Some users have had varying results with stuff being delivered that was different then what they ordered. Out of Asia, probably China.
https://ebikessf.com/ - San Fransisco
https://www.Yescomusa.com - Generic hub motors but only in kits, lots of had great success. Not sure if they have warehouses in USA or if they are strictly out of Asia probably China.
https://www.ebikekit.com/ - Type in ebikekit into ES search to find out more.