Check out
www.diyelectriccar.com it's got a ton of builds. I'd stay away from the "kits." As you found out they are very expensive and secondly they are usually far from complete. EVWest has the most complete kits but they also have very poor service, so once you buy it you are on your own. Check out
www.bratindustries.net, he has a lot of parts for the aircooled Porsche/VW stuff. The most cost effective option is to use his axle adapters for a Nissan LEAF motor. 2020+ LEAF Plus models have 212hp so that would be a riot to drive.