36/48v 225A controllers... Check item 330216452635
http://cgi.ebay.com/ws/eBayISAPI.dll...0%3D%26fvi%3D1
The seller has three.
These are identical to what we've got in the ForkenSwift. More appropriate for an electric motorcycle than a car, though. Unless you're willing to build a controller bypass circuit for when you need max juice.