We have on hand a large number of used parts, so there's a fair chance we'll have the missing jack or tongue replacement you are looking for. Jacks by Hubbard, Dowd, Zuckermann, Hill, Instrument Workshop, Bailey, Rubio, (Martin -out of stock), Goble, and even replacement tongues --special order--for Challis, and Pleyel. Send in a photo, quantity and your contact information--please include a phone #.