Just get it rebuilt, it's amazing what a good prop guy can do. Better yet, buy a new acme and get it reworked as your spare, that way you never let it ruin a good weekend. I don't know about you, but a good weekend is worth more to me then a $300 prop. Some prop companies even call thier spare prop kits weekend savers...
Karl DeLoff at
www.boarditup.com has the best prices for Acme props.