>>1800026>>1800095I mostly use Shimano hubs so ymmv. I usually ebay first for NOS stuff, but I've also ordered axles, cones, etc from Wheels Mfg. They list their measurements, but a lot of their stuff has been out of stock.
>>1800109I've polished cups & cones before (had a bearing crack & gouge the rear ds cup), but even if you have the right setup and know what you're doing, it's probably not worth it. There's no restoring it to 'new', it will always be a worn part.