Hi XTR, yes, there are a sprinkling of as new original barrels on the market.. and they are made very well as you would expect.. So, barrel availability is really not yet an issue..
The real problem with Luger barrel replacement is usually encountered with the very nice units.. where a mark or scratch is a definite bad deal... The tapered barrels are sometimes hard to hold, and the receivers are victim to even the slightest miss-step or ill fitting wrench... I enjoy the challenge.. but even I have some reservations when all is on the line...
... but curiosity and ignorance drive me forward... and, I'll get it figured out, if there is indeed, a way to do so.....
... best to you, til...lat'r....GT