Hello! I'm just curious why the part needs to be replaced? It's very rare that there are any problems with the stock part.
Yes, generally only available as 'Mustang Tremolo Tailpiece'. It should be very close fit, but as always, verify return policies prior to buying anything.
Some of the most popular non official parts would be at Allparts [part url] and Warmoth [part url].
Also many more knock offs and used parts on a site like Ebay [url].
