For all you guys who pay attention to stuff on the curb, I need some parts. Specifically I need some BMX or MTB parts for the folding bent. I'm looking for front and rear hubs that have brakes, and rims. The rims I'm looking for are wider than the 21 mm I have now (27 mm outside to outside) but everything will be cheerfully accepted. The front rim I have now is chrome steel on a freewheel hub. Yes freewheel, this will be a FWD folding 'bent.
 
I have determined that no commercially available rim brakes will work with the 20"X3" tire on the rims I have because of interference with the sidewall of the tire, and I don't have the facilities to modify aluminum brakes and be sanguine about their reliability. I also don't want to build my own brakes out of steel. It would win me points at the car shows, but not with the police should I get stopped. So I need hub brakes, either disk, roller or coaster brakes, with rims that have the same number of holes.
 
Again I'm not asking for anybody to go buy anything, just watch for BMX or mountain bikes on the curb getting thrown away and grab them when you see them. If I have to build my own brakes the old style steel cantilevers with the straddle cable will be especially welcome as a starting point. The already have pad mounts and pivots so all I would need to add would be actuating arms to clear the tires to make linear brakes out of them.