I THINK Brecoflex has them. I don't have their catalog right at my house (it's at school) and the person on my team in charge of belts is not easily accessable right now.
But I'm pretty sure they have the belt you need. Send them an email because they are usually very responsive. However, beware about some belt backings may take up to 5 weeks to deliver. However, most belts take two weeks.
If you want more detailed information, email me and I'll try to scan some pages of the catalog for you on Monday.
http://www.brecoflex.com/
-kai