[chrisguyw]

Not sure where you are located, but, in the UK, ABSlotsport has single flanged bearings in the size you need (3/16 od.). He only has 1 type listed, which while very good quality, may be a bit pricey. You could give him a call to find out if he has different quality options.......all will be better quality than the Slot-it ones.

Cheers
Chris Walker

PS a good quality and well aligned oilite bushing will perform better, and last longer than a cheap ballrace.