I bought a repro backglass for my Gorgar from Mayfair about 12 months ago. The quality of both the product and the packaging was excellent.
However, The only way I could pay him was through Western Union, and their fee's are astronomical, and as you said, he wont ship overseas. I had mine shipped through an online mail forwarder and in the end postage cost me a little more than the actual backglass did. It didnt bother me....I wanted one bad enough to pay for it, but be aware, it'll cost ya.
I still have my original here too.... I MAY be willing to part with it, not sure. It's a bit average, probably about the same condition as most old 80's flakey b/g's.