If anyone is parting out a 1989 thru 1995 XJS I am looking to buy the JLM1475 ABS actuator - Master Cylinder please contact me if you have one to sell that works.

 

You are very unlikely to find one that is working, and if it is, very unlikely to work reliably. There is a guy on here called Orangeblossom - seems to have hibernated for the winter but we will be sending a Franco/Australian search party for him in the spring - who rebuilt the thing himself and did a fantastically good job at home using normal tools etc. IMO, if yours is shot, rebuilding it yourself is the best and above all safest way to go. Orangeblossom's posts have full pics and explanations.
Greg