I don't know if your stilling looking for suggestions, but I was interested in https://www.amazon.com/gp/product/B00EKJVYLQ/ref=ask_ql_qh_dp_hza?th=1 which is a sausage caulking gun that has a high thrust ratio for easier extruding. they also carry a 26x1 which I think would be even more helpful, but I haven't tried these options myself. I am currently looking into them. If you can swing it electric sausage caulking extruders would be most ideal as there is no hand constrictions, but they are very pricey.
