What banks do financing on the wholesale side for spec homes?

I have a friend who is a builder and would like to use me for his mortgage broker. I have no problem finding banks who will do financing for owner occupied builder programs, but nothing for spec homes. A lot of the banks offer spec programs on the retail side, but I’m having trouble finding it wholesale. Thanks!
I do know what a spec home is
My rep at Indymac said that they only do owner occupied construction, but maybe there is another dept she’s unfamiliarr with? I’ll ask her again. Thanks!