Which micro cars have good parts support?

[bashville]

I have been using Losi micro rally cars for kids parties but have found parts hard to come by recently. The cars are bulletproof and I've not needed anything for a couple of years, but now I that I wanted to sharpen up the cars a bit, I'm finding that basic parts such as wheels/tyres/diff parts are unavailable. Not sure what has been going on but see similar problems on the forum for other makes. Anyway, I was thinking of changing the fleet to Carismas, the i20 looks great, but can't seem to find that for sale now either! Nor parts. Are there any micros (1/24-1/28, as nothing else fits on Kyosho 50 tracks) with good parts support that run brushless and 2.4ghz?