There is a brand of regs that will sell you repair parts, I think I have a link to it on my work computer and I’ll check Monday.
Yeap, statisticly your reg is most likely to fail right after it was serviced by that factory trained tech. That’s why you test it before leaving on that exotic trip.
But your heirs don’t care who serviced the reg you took your last breath from, you or the LDS, they will try to $ue the manufacture anyhow!