In general shape, the lens for your rotating light looks similar to the Federal Signal model 14. Based on the data sheet for the model 14
http://www.fedsig.com/docs/4100HD_Model100-Model_14.pdf the same lenses also fit the model 100 - so they may have been used for other models too over the years. Sometimes plastic parts have the part number moulded in, check to see if you can find a number similar to the one listed on the data sheet - 447500. You might want to contact the Federal Signal representative for Quebec (in Montreal) to see if they can help you identify and find the part you need.
http://www.federalsignal-indust.com/...ovID=11&View=2
You might find restrictions on the sale and use of red or blue lenses for vehicles in Quebec since the police use both colours (don't know - just guessing) but in Ontario blue is also used for snow plows so should be legal for sale and once you have the part number online sellers rarely ask what you plan to do with the part......
For your light in the blackout position, I didn't find the 4455B listed in a quick search but the GE website lists many sealed beams
http://genet.gelighting.com/LightPro...Y=Lamps_Sealed Beam_PAR&CHANNEL=Commercial They also have a Montreal sales office in addition to their 1-800 number. You are lucky to be close to Montreal with its significant industrial base rather than a city that is more administrative than industrial..... On second thought, if the bulb you are seeking has the military style wiring coming out the back like the complete blackout unit, it may be hard to find and you may have to adapt a civil pattern lamp to fit inside your housing. There also used to be dye/paint kits available to colour the front of clear bulbs but I have no idea where to find them now.
Several of the US based Jeep parts sellers show a bracket for the slave cable.
https://www.armyjeepparts.net/p-1179...g-bracket.aspx http://www.debellajeepparts.com/m38premier.htm
For Canadian sources, try Brian Asbury, Niagara Military Parts and Willys Acres (and there have to be others as well)