So far everyone has mentioned about 4% of the DB's (Dual BOAs) out there.
The internet is hard, but I'll teach ya an old indian trick:
1. goto google
2. type in: dual boa
3. on the left hand margin, click shopping.
The first 20 pages should show MOST of them.
Pro tip for a noob. Lol, didn't think of that one. Thanks man.