Hi Joel, every competent scuba technician should be able to get your reg serviced. Problem might be to get the service kit for your reg, or at least the HP seat.
I repaired a Sea Elite regulator a while ago (not your model), the HP seat looked similar to the Aqualung HP seats, but was different and the hole in the seat for the push pin was closed, so I was facing an unbalanced diaphragm 1st stage, something I had seen before only with the "widowmakers"of Poseidon.
Your regulator is supposed to be a balanced Diaphragm reg, if you cannot buy a service kit from Sea Elite, maybe one of the common diaphragm HP seats can be used. But this has somebody to check who really knows about this.