Hey Ken, too bad Thomann are in Europe....they do a stainless steel new frets PLUS plecking the new frets (they have a plec machine).
You can advise the setup, frets material,height, nut height, neck relief, action etc for around 500,-.
And their customer service is very good in my experience.
Is it no option to reach out to Gibson and ask them if they would install new frets and/or have the guitar plec'd ?
I mean, you have an excecptional piece of their history...
Perhaps Stewmac would be interested in doing the refret and make a Youtube vid for their channel/advertising and give you a good price.
Imo most repair shops don't do the refret right, especially the levelling and I guess, especially over time, the guitar will be buzzing etc.
Good luck.