At this point b&w film is a big problem.10" color is still available from kodak. Films that are as thick as sheet film don't work well. 120 film thickness is best. Aerial film is usually on a thin base and works well. It can be found occasionally in 5" and 9" in outdated lots, and can be had from kodak as well.
I heard ilford might sell 9.5" aerial.Best bet is a #10 camera as far as film goes, or a #5 and aerial film. You'll have to learn to spool. It would be great to have people cut 120 base in 100 foot rolls. Forte used to do it. Alas they are gone.
Jamie