Most I've seen run about $15. That seems pretty reasonable for a odd-ball frame.
I've found frames at the following links:
Again, the thing is, I don't know which are good and which are lousy. I'm not looking for anything high-end. Just something that looks nice and won't fall apart.
Have you tried looking in CBG( Comic Buyers Guide) They run ads from different companies that are obviously geared toward the comic collector.
I haven't looked there. Next time I am in a book store, I'll thumb through an issue.