"EXTRA" .357 Max?
If either of you take a notion to go the route of another bore size to scratch this particular itch, please PM me so that I can help you fund it. My personal/current/only 35 caliber itch is a .357 mag or Max. Until I get that far, I have no other .35 caliber dreams.
If I were in your shoes though, I would likely be looking at the 35-30. 30-30 brass isn't tough to find and it has a rim. If I were doing something without a rim, I have Mauser actions set aside for that kind of thing.
I'm not saying this is the best way to go or making any argument for practicality over any other suggestion. It's just one of those wildcats that has always appealed to me.