I just ordered a pocket holster for it from Ruger's website for 12 or 13 bucks. I haven't seen any IWB holsters for it yet.
Just curious, but have you tried just tucking it in your waistband withouta holster? I've done this a bit & it isvery secure. Personally, I don't plan on buying an IWB for mine. Tucking it w/o a holster seems to work fine. I've got the pocket holster on the way, and I did purchase an ankle holster at my local Gander Mtn. I will check the brand & size of the ankle holster & post it here later if you like.