There is a live Converted Automatic Prohibited class (grrrr! Canadian gun laws):
BROWNING , MODEL: 1919A4 CONVERTED TO A L3A4 , CALIBER: 30-06 SPRG
(
https://bid.switzersauction.com/BROW...SPRG_i38101326)
Listed for auction to close on 21 Aug 20. A week to go the bidding is $1400. There are gunshops that will deactivate for a fee if you need one of these for your Postwar British HMV.