MC jacket zipper replacement

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**Update-Finally got my jacket back from Twin Peaks today-took long enough, the claim was a delivery issue with the required zippers. I think the father is a bit more responsible than the son, the work was well done though pricey and I don't feel I can recommend the shop. Will look elsewhere if I need leather done again. I went there Wednesday to pick it up regardless of whether it was done or not and just by coincidence it was being worked on, promised later that day-and it was finished that afternoon-but I couldn't make it back until today to get it.**

I have a great heavy duty motorcycle jacket that isn't made anymore. I need to have a couple of the zippers replaced if at all possible. I've been unable to find a replacement jacket that provides all the features this one has (FirstGear Scout IV). I know about the seamstress Lydia that shows up at various events and dealers but she can't replace the zippers. Thanks for any help.