Radio Shack still carries electronic parts, but you have to order them via their catalog or from their site. I think it falls under the commercial section. (at least they did about four years ago). I find it dismaying that there are few real electronic parts stores any more.
While we are on this subject, anybody know the company that used to rebuild various circuit boards (like for TVs) and would remarket them?? Also, if they are still around?? (They required a trade-in) I got a couple for some TV repairs back in the late 70s and I've forgotten their name.