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I have had good luck with TCI, but they may be a little spendy, depending on what you are going to do with it. Any local shops with a good reputation? The other option is to go to a junk yard and pull a couple of them. Replace as needed They should be only a hundo to 200 apiece (depending one which one) and who knows, you might get Thousands and Thousands of miles out of one. I have out of a TH-400 chebby before.