Hand Tools Archive
Years ago, I tried to get a set of tanged chisels from oldtools. They don't ship to the US, or pretty much anywhere outside of Europe.
Ebay.co.UK will expose more auctions of parts (to US buyers), though, and many will ship to the US. For whatever reason, ebay doesn't always do a good job of providing results of UK listings on the .com site. Record tools and some other UK specific things (4 1/2s and 5 1/2s are more common there than here) are cheap enough in the UK to cover the global shipping and still leave a lot of extra room.