Fiberous is what I use on SS. Stuff em good an tight, keep yer temps down in the 180° area to an internal a 155° then immediatly inta a cold bath till the internal drops below 120°. Should help bunchs with the wrinkle problem.
You can get a old style casin called Hukki which has the netting effect built onta the casin, gives it the old butcher shop look, but ain't cheap. Ya can do somethin similar by addin nettin to the fiberous casin, gotta be the same diameter if not a bit smaller then what yer makin so when ya stuff it push's the casin out through the nettin. Looks really nice but a fair piece a work.