I paid $75 for the one below on eBay for my 986 2.5" which is the same size. The ad states that it is for a 686+. It is good quality and retains my revolver very well.
1. JM Custom Kydex AIWB purpose built for my WC GP100. It fits my 686 PC like a glove.
2. A Master's Holster OWB skeleton. (On ebay: Leather Holster for RUGER GP100 / S&W K or L Frame Revolver - (6512 Brn)) Also fits perfectly, though the gun sits a bit high so a good belt and some tension is important.
I carry my snubs, including my 2.5" 686 in a Galco Combat Masters. They're a well made, nice looking holster that are reasonably priced and easily obtainable.