My experience is that the 85 is just a tad larger than a comparable S&W 60. Tightly fitted leather holsters for J-frames will usually work, but you have to break them in a bit. Usually anything Galco, Bianchi, or Hume will fit just fine. Kydex is a different matter. Unless you can verify fit right then and there, avoid buying a Kydex holster made for a J-frame.
I use a Galco for mine. I think it's their Speed Holster or something like that. Also have a Galco Speed Paddle.