A typical gunsmith who offers refinishing services would most certainly have bead blast equipment.
Or typically, auto paint shops, auto machine shops, welders, and powder coaters use sand or bead blast all the time.
Others might include a friendly tombstone company, or sign company, who would be gun friendly enough to lightly sand blast your gun.
Use your imagination.
And let your fingers do the walking through the yellow pages.
Keep in mind that none of them will be skilled enough to strip the gun and get it ready for blasting.
Or clean and re-assemble it afterward.
You will have to do that yourself.
In the long run though?
It might be cheaper, and more satisfactory to trade the gun you hate the looks of for one you like the looks of.
rc