It looks like the thread is the same as my Record, which is a long way from a standard thread, be it ACME, square or 55/60 deg. If it is then the cost and time in trying to reproduce the angles involved would not be worth it. The CI will probably outlast you if you keep it well lubed.
1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.