As far as "F" paper goes I'd check out Pearl Capital out in New York. They have pretty loose guidelines and will fund almost any deal as long as they can see "wiggle room". Need a 15K deposit p/month mark though.

Regarding an SBA lender...I don't have anyone specific to recommend. But what I can tell you is that there isn't a ton of money on the front end of an SBA loan. Most lenders pay between 1-1.75% So find yourself a lender who can accept perhaps something along the lines of a processing fee so that you can "add a bit of juice".