Is the trigger unit made out of brass or steel sides
Mach 1 which is wider than the rekord assy model, so the trigger housing block needs to be machined out and has brass sides.
or
Mach 2 was thinner and can be used as a direct replacement for the Rekord steel or brass.
if it is the later it is better as no work requires doing
shame the trigger is damaged is it the straight or angled trigger
i would say £200 for both items