Apart from the 50+ estimated fitting kits for the WS19, there were various local modifications, improvisations, and outright bodging to put sets into vehicles.
There are several (at least three and probably quite a few more) different plates that fit on top of the WS19 (with or without supply unit), and an absolutely ridiculous number of (mainly post-WW2) carriers for various combinations of sets, supply units, amplifiers, etc. - they got up to around No.82 by the Larkspur era before giving up with numbers and calling them "Tray, Support, Radio Set" and a stores code.
The WS22 used Carrier, Set, No.4 as far as I remember.
I recently obtained a lot of carriers and trays for a WS62 set in trailer or Jeep, but it came with an aerial mount for the WS19 'B' set (and I'd like to find the matching 'A' set mount. purely to find out how the variometer fits to the box on top of that). (I'm also missing the WS62 carrier - No.40, and a lot of the items to fill the various other carriers (which are common to the animal pack station) - the list of "bits I'm looking for" is getting longer rather than shorter!
As far as Canadian manuals go, they reprinted a large number of the British ones, but had their own range of manuals for kit built in or specific to Canada. There would have been a fair amount of parallel development going on.
(This probably doesn't answer your question.)
Chris.