w4dsb: I would take a look at Uncle Mike's (Michael's of Oregon) barrel band set-ups, they might have one that would fit the barrel of the Ruger. These are 3/4 bands that tighten onto the barrel so you might be able to find something there that could work.
As for the grip stud - I'm at a loss there. I wouldn't recommend modifying the revolver like a military pistol, with a sling swivel off the bottom of the butt but I wonder if someone doesn't make a spring steel clip that could slide under the gip, sort of like a Tyler T-Grip for small and medium frame revolvers or if you could do something like that yourself or have a gunsmith work one up for you. Just a thought but HTH. Mikey.