A couple more DIY options. The first is a small Eagle Creek fanny pack I modified by chopping off the belt and sewing on a few leather bits. Straps are leather toe straps.

The second is a Dooney & Bourke handbag that I use as a handlebar bag. I know others have modified these for saddle bags. They are really nicely made and quite spendy at retail. I found mine at a yard sale for $5. They are all over Ebay. I just cut a couple slits and use Twofish velcro straps (with a dowel on the inside) to attach to the bars.