Look in the FAQs area and there is a link for sites that you can get sparts from. I never get anything from david silver if i can find it elsewhere unless you want EVERYTHING stock. They are expensive!
Actually, in my experience, I've found DSS has reasonable, often better prices than most other places on the parts I've purchased, even with the exchange rate. Plus, not only are their shipping charges comparable to U.S. suppliers, but the shipping times are
MUCH faster. I almost always get my parts from them less than a week after ordering.