I found one on ebay that was N.O.S. , but the rear mounting studs were different offset ,but the rest was a perfect match , I was able to transfer my original rear section plate with mounting studs to the new front with all the new inside parts , now after I did this I was told of a place that rebuilds is called Booster Dewey does rebuild the original boosters or your booster for you , the picture shows the one I purchased , all the numbers stamped on it matched mine , but after it was delivered is when I found were it mounts to firewall were different , but I am confident when I took my old one apart and cleaned it up that it will be fine as it was an easy swap of the rear plate section , even the arm to pedal was the same , so I am unsure as how or maybe it was a different model or something but all numbers were the same , either way it turned out as original