Well, use a Mk1/2 action then. Plentiful and some Mk1T's were converted during the Fazakerley FTR era. Not many but some were drawn-in for conversion to L42 but rejected as they were not the standard norm specified for the L42 project.
Mind you there were plenty of all mk/types converted at Ishapore. So when it comes to choice the world is your oyster. And as you say, it's just a good repro and not a fake as such