Hey Paul - I've been collecting worldwide Star Wars cards and related since a kid in the 70s (mainly vintage stuff) - it extends to wrappers boxes etc too. I'd be happy to share info with you just PM me. It may be too late though
Quick info - Topps picked up the SW licence and the cards came out 78 in the UK. At this time they were distributed by Trebor in Maidenstone - they moved their operation to Dublin Ireland in the 80s. Boxes of the gum cards came with 48 packets at 5 p each (5 cards a pack). Box had details of manufacture on the bottom. There were 2 series; blue cards and then red cards (uniquely numbered 1A-66A) other countries (USA, Canada) carried on from 67... these cards were available all over the world Brazil, Mexico, Argentina, New Zealand, Australia etc. I've got some interesting items - uncut sheets, full retail display boxes, wrappers, packs etc. Panini also did stickers for the film that were available in English, Italian, German (couple of others too but can't remember off the top of my head). In the UK Walls did some nice ice lollies too, different wrappers but no cards or stickers. Shreddies transfers (4 diff boxes and transfer sheets) again 1978 - Walls saguages and LookIn comic also did some small individual transfers. Trebor who distributed the cards also made two flavours of Chews as well.
Empire Strikes Back 1980 Topps in the UK didn't pick up the licence at first - they trialed the first series of cards in very few shops to test the market (red box and wrappers and red bordered 132 cards and 33 stickers - 10p a pack). I have a display box and set (basically same cards as USA but box has 10p tabs on it). FKS did a sticker album and stickers that the kids in the UK went for (unique versions of these are also found in Spain, France and Netherlands and Belgium). Then a little late Topps UK tried to come back into the game by releasing Initial Stickers with gum (this was a unique 48 pack box (blue) and unique wrappers - red with Yoda on them (6 stickers a pack) again distributed by Trebor Maidstone. The stickers were similar to the green 3rd series one that came with series 3 USA cards 67-88 - only lighter (similar to how the UK cards are lighter stock than the US ones). I've got a box of these too. Walls did another round of tasty lollies this time each had a sticker inside (12 different). Trebor continued with their Chews too - 2 flavours. Dairylea took up the transfers - 4 different - sadly no Shreddies to munch this time round.
By the time Jedi came out in 83 I was entering my teenage years and wasn't impressed with the fluffy teddy bear kiddie film and bubblegum cards were on their way out generally in the UK being taken over by Panini stickers - they'd be growing since 1978 in the UK putting FKS out of business in 83. Football was big sticker business and still is. Anyway, Panini ran Jedi albums and stickers - available everywhere (UK, Europe, Australia etc). In the US Topps did 2 sets of bubblegum cards and also self-branded the Panini stickers and album too. Australia and New Zealand did the first set of gum cards but not the second. Hope this helps as a start. Good luck with the book - I'll look out for the Dr Who one