RE: 1/8 scale on road
The only one I am aware of is the Ofna Ultra GTP2.
If you feel that you need to stick to 1/8th scale with more variety, then I'd suggest going to nitro. Ofna, Mugen, X Ray, and Kyosho make kits. And as far as brushless electric conversion kits for those go; you'll have to google that yourself.