You chances of getting a replacement is slim. Here's what I would do. Get some small needle nose pliers and take the bogus screws off and take it appart. Set it on the fender without the top portion of the housing. Sometimes the top portion of the housing will trap the needle and prevent it from moving. Also look at the back clearance of the needle to ensure nothing rubs and make sure the 3 pin plug is tight inside the housing/board. Good luck, hope you'll get it to work.