Hi Scott
Have a little look at this
https://video.search.yahoo.com/searc...a&action=click
what you need to determin is the diameter and pitch/form of the thread, this is a left hand hand thread. The jib strip for the Cross slide will probably be the same arrangement as the topslide the small screws adjust the clearance between the components and are then locked when you have the slide moving with minimum clearance. The Tailstock is almost identical to my Elliot Emcomat 7. you can buy leadscrews and matching nuts(do a web search to see if anything is suitable) also you can get lefthand taps on the bay of fleas. you will need to make a bearing holder for the handle end of the cross slide that will attach to the cross slide(There should be a couple of drilled and tapped holes already located on same)
Regards
Mike
Doddy beat me to it