The Fairey Prince V12 is an option, it's run for 500 hours at 420hp in 1934 according to Lumsdens British aero engines, as it's a relatively modenr design it should be easier to set up for production.
Could you get talk to Rolls Royce and get the Kestrel or Buzzard set up as a proto Meteor?
Fairey P.12 Prince - Wikipedia
en.wikipedia.org
Could you get talk to Rolls Royce and get the Kestrel or Buzzard set up as a proto Meteor?