Most parts are available from Myford, their website has parts diagrams for the machine and a list of parts and prices. eBay has a number of people who break myfords and most parts are available from them cheaper than new. The ML7R shares many parts with the pre power cross feed super 7. The headstock, tailstock and carriage are all the same, the cross slide and top slide are from ML 7. The mk2 clutch from the super 7 is a straight swap. Sourcing parts should not be a problem but the prices can be a bit steep.
Mike