Guess I can answer my own question here. I tried fleabay and other auction sights w/o much success. Every once in awhile a loading gate is listed but they go for exorbitant prices, even though usually pitted or reblued, etc. I finally bit the bullet and ordered a new Miroku manufactured assembly that Browning says fits their Model 71 or 1886. Lo! It fits almost perfectly. I'll do a little milling but am very happy and my 1886 project gun is coming along just fine and will be a good shooter. Caliber .38-56. FYI.