Get a barrel vise, receiver wrench, breaker bar, pin or hole gauges, and headspace gauges (GO and NO-GO) and do it yourself. The tools aren't expensive, and you won't have to ship it, plus you'll have the tools to work on it in the future if that is required. Might have someone nearby who will lend you the tools.
I've built a dozen. They're really not hard to do. If it needs to be refinished, perhaps ARS would be appropriate; if you are fine with the condition of the parts you have, wrench it!