Twochai, I fully understand why Canadians are chauvinistic about blown canopies! A handful of Chipmunks here are fitted with a locally produced "low drag" blown canopy.
Because the windscreen of the UK-built T.10/Mk.20/21/22 differs (including in cross-section) from that fitted to the DHC-1B, it isn't possible to simply plonk a Canadian canopy onto a UK-built aircraft.
Accuse me of being a pedant evansb, but a Chipmunk with a "flat engine" ceases to be a real Chipmunk I reckon!