if it takes single stack magazines then any 1911 holster will work. if it's a double stack then it will be a little harder to find one. here is a link to one to get started but there are many to choose from. budsgunshop.com/catalog/product_info.php/products_id/712009940/DESANTIS+C%26L+THUMB+BREAK+SCABBARD+CLT+GOV+%26+1911

It was depend on if your pistol is railed, non railed, single or double stacked design. I have the RIA Double Stacked design and the holster I chose was made by Galco : https://ads.midwayusa.com/product/248768/galco-fletch-holster?utm_medium=shopping&utm_source=google&utm_campaign=Shooting%20-%20Holsters%20%26%20Belts&utm_content=248768&cm_mmc=pf_ci_google-_-Shooting%20-%20Holsters%20%26%20Belts-_-Galco-_-248768&gclid=EAIaIQobChMInqnnmOu72AIVTUwNCh3Ugw1dEAYYASABEgI3WfD_BwE

rail or non rail, single or double stack 5 or 6 inch barrel leather or not retention or not these make it hard to give you the best answer I would start with alien gear they are great people to work with Phone: (208) 215-2046. http://aliengearholsters.com/

Alien Gear makes a holster for the Para double stack that should fit the RIA 10mm.
http://aliengearholsters.com/holsters/para-ordnance-1911-black-ops-14-45-5-inch-railed.html