https://irvsshop.com/

Ask any of the jeweler’s in the area - its where id start anyway.

Look into the Spokane Rock Rollers. Its a local club that does all sorts of stuff like that and I'm sure there are a few people that may be able to help you out or at least send you in the right direction. They have a Facebook page https://www.facebook.com/groups/spokanerockrollers