The Myford VMC was supplied to Myford's by two different firms in Taiwan. Early machines were extremely well made, later machines from another supplier in Taiwan were not so good.
You will be extremely lucky if you obtain a Gib strip. It will of course need scraping to suit the machine. As usually the Gib is supplied over length for this purpose.
I have made them from cast iron in the past. Using drill shanks it is easy to determine the taper. By inserting the drill shanks at each end of the casting with the knee pushed hard against the master dovetail. I used a largish Shaping Machine to make my Gibs. Clocking along the length of the Gib to get the desired taper using the Ram of the Shaper.
The last operation is using normal and inverted dovetail cutters to form the correct Gib profile. Care needs to be exercised to ensure the master dovetail surface of the Gib is the reference surface for the dovetail cutters. Otherwise it will be time to start again.
Regards
Gray,