The only ones I've worked with are Joe Shiozaki (JS Air Cushion) in Azusa. Joe used to be a full service gun shop, but he specialized in stock work. I haven't seen Joe in several years and I understand there's another guy working with him. And, Mike Gregory in Ramona. I talked with him not long ago. His place is set up as an assembly line for doing the Shock Master conversions. I don't know what other work Mike does. Stock fitting is important with both of them. If Joe or Mike can't help you, they might give you some leads.