I'm thinking about unmalted spelt, although I have not really decided. I have seen that Best Maltz and Weyermann's has Spelt Malt available, but I am leaning towards whole berries or rolled flakes.
Flakes would be great, but I have not been able to find many options online. I have seen Bob's Red Mill has Rolled Spelt but it is not available anywhere I have looked. Berries are pretty available, and have some good local options. I'm not sure if I am going to do a cereal mash, I might just grind it fine and BIAB it. I don't know how it'll run in my mill, but I guess I will just have to see how it goes and do a cereal mash if my crush is crappy.
The current plan is to use about 20% in a Saison.