Buttons are impossible to find!!!!!

[Phogfan86]

I love these folks. Not sure if any of the square or diamond-shaped buttons they have are dressy enough for your taste, though.

Buttondrawer.com's Celtic Collection

[piperdbh]

I can recommend Highland Xpress. They're easy to work with, ship quickly, and a pleasure to talk to.
Those ebay buttons look like pretty good deals, too.

[Eujeankilt]

Another nod to Three feathers Pewter. I used them for my jacket conversion and I'm quite happy. They're a small business from a small town in central Ohio.

Dale

[isantop]

Thanks a lot for all the suggestions! I think I'll go with the Three Feathers Pewter, since the price is about unbeatable and I like their selection.