The instruction leaflet looks a bit rough around the edges for something that has spent all those years in a mailer box and imo it should not have the catalog so I would lean towards it being pieced together myself
As for the ackbar I couldn't say with certainty, it looks to be a later overstock style box.....mailers are so all over the place with there Baggie/box combination, It's impossible to say what came with what especially when it comes to end of the line overstock mailers...
I see a lot of the ackbars and nn mailers with the overstock (no labels) boxes, bio inserts and mihk baggies coming up for sale in the states, they could be Kenner overstock or stuff sold in the 90s at big fairs in the states from uk sellers as a lot of that went on but this is all guess work and what if's
Heres a pic of a u graded ackbar with a mihk baggie.....I have only ever seen the mihk baggie ackbar with the bio insert so can see why UKG may have give it the KB