www.rockauto.com is a good place to buy parts.I have a 1991 xj with an AX15 swapped into it. The clutch went bad and I can’t seem to find a new clutch for it. It has an internal slave cylinder. Can anyone share where to find a clutch?
Try to find out what year XJ the AX15 came from. Since it has an internal slave, it could have come from a 1989-1992 or a 1993 XJ. The 1993 uses a different clutch kit than the others. I'm sorry, I cannot tell you the difference.
Once you find out what you need, Sachs, Valeo, Luk are reputable aftermarket brands.