Speed controllers to use with mobility scooter motors?

[SnowLabs]

Thanks for the helpful responses guys!

So I've ended up getting two Robotpower Vypers and I've decided to get a couple of motors and do the drive from scratch. I'm on the hunt for the two drive motors... any suggestions? I'd get a couple of Bosch GPAs but they are really hard to find. I'd need something in that power range at 36v. To be honest, this is all for a HW I'm building with the intention of applying for Robot Wars series two. I'm one of those guys that watched Robot Wars fanatically on TV when it was on, now I'm 22 and I'm building one with my dad, who I'm pretty sure is more enthusiastic about this than I am!

I'll post a build diary when I've got more to show, I'm pretty sure what I'm building is somewhat unique..