Anyone know where I can get a set of Sierra spindles so that I can make my own uprights?

Maybe Cortina ones would do?

the sierra spindle is part of the hub. the bearings are housed in the upright.

check out alanB. he's made his own uprights with bolt on stub axles. could be from something american though iirc. maybe you'd be able to source racelada stub axles seperately as another option? try mnr for them.

tom

Off the front of a Sierra??

How about these Linky