jibba jabba, Most if not all of your questions are thoroughly covered in Ken Joyce's excellent reference book,
INTO THE MAELSTROM. It has an entire chapter just on the Canadian army parachute badge. Profusely illustrated. The book is the standard reference, published in 2007.
In addition to the chapter on the wing, there are lenghty discussions of the shoulder titles, formation patches, cap badges, collars etc., plus a thumb nail history of the 1 Canadian Parachute Battalion and associated units.
Your final point is perhaps the most salient. The manufacture and issue of the Canadian parachute badge continued into the post war period and the pattern is indistinguishable from wartime patterns. Later issue had synthetic backing material, often a nylon type mesh backing.
Into the Maelstrom is available through Service Publications.
http://www.servicepub.com/