I used to work on diesels, mostly tractors and big trucks. You might try calling a fuel injection shop that works on pumps and turbos. They can usually repair one at their shop, or either tell you where to take it. DO NOT, and I repeat...DO NOT take a diesel fuel injection pump apart!! If you do and you touch something inside before dipping your hands in diesel fuel, you will score and scratch the internal parts due to acid on your hands. That also applies to diesel fuel injectors as well! The pump parts are basically useless at that point. When I worked in the injection shop we had to do that, which over time will break your hands out and cause cracks and pain. I know that one of the pump shops here in town services those little KiKi Japanese pumps and many others as well. Hope this helps.