I use a triple K model 314-26.... bought it through the Ruger store with two extra magazines... this is an inside the waste ban leather holster with no top strap... much like the Bianchi I used for years with my Sig 230.... but even a thicker leather. I don't actually wear it inside the waste band usually but inside the belt but outside the pants with a long tailed shirt or sometimes just a tee shirt hanging out. This holster comes with a Ruger logo on it for what it's worth.
here's a link to that holster on Shop Ruger . com: