Numrich has similar problems. I bought an upper band/bayonet lug they advertised on Ebay. In email exchanges they represented it as old, milled reproduction made in the USAicon, available in blue, which is what I ordered. Got the piece the other day and it is obviously cast and very rough. It will be going back to them. I have already purchased an original from Dupage Trading at a great price.
Almost ready to put my project together for photos.