I believe what you are looking for is a collagen casing (what Johnsville uses) instead of natural casing that most places and people use. You will probably need to do some calling around to see what places use them, or can use them. I’m not a fan of Von Hanson’s, their end product is fine, but they are a big corporate meat market, and your meat will not be processed by the shop you drop it off at. It will be shipped to the main processing location and shipped back, hopefully it’s all yours, plus they are very expensive.
I had a whole hog processed by Lonsdale Meat Market, and everything was very good. Otherwise Pekarna Meats in Jordan and Hackenmueller’s in St. Boni are good too, but I’ve never had venison done at either. Any of these are probably not too far of a drive from the South Metro. I personally drive to Pierz and have Thielen’s do it, as they are the best imo. Otherwise there are a lot of good options in Central MN, if you don’t mind a little drive or have a quantity that would make the trip worthwhile.