Joseph, the footpockets are a separate entity from the blades- get the pockets that'll fit and you can put most any blade in there. If you are a heavier guy then a stiffer fin might be in order, but it's not written in stone.
OMER, Waterway and Beauchat make great fiber blades as well as many others. Maybe check out DB resident
jimdoe2you and see what he has available- send him a PM and I'm sure he'll be helpful.
If you can't find a big enough footpocket, there are open-heel freedive fins available
Riffe Open Heel Fins
Freediving Fins (Esclapez)
