For my 480 SRH I use a Bianchi cross draw holster. It fits me really well. The thing I like the best is that the shoulder strap hooks to the middle of the holster and wraps aroud your waist and hooks back into the holster. It keeps the holster tight to your side.
Last month I picked up a Bandito shoulder belt made by Pistol Packaging. I got a holster for my 44 and my MKII. It fits well. I have not used it enough in the field to give an honest opinion, but plan on changing that real soon. The workmanship is excellent, and the holsters fit the guns like a glove. Here thier site.
Pistol Packaging