Anyone know a good source (online, I guess) for replacement dust caps for old (well, in bike shop terms...really, I'm talking early hyperglide 7 speed Shimano) hubs. I have a couple in a hub I'm building & it looks like at best they can be 'worked' to fit/shape correctly, but I would probably have to hit them both with a small grinder to make sure they don't rub the cones or washers when, nice, round new ones would be nice to have.