I have a large piece of board, particle board with melamine covering I guess, that I use both to protect my table from jigsaw glue, as well as to carry it to the store for laminating. You MUST glue the puzzle first, using puzzle glue.
I just took one to the store using a big sheet of bristle board because I still had another puzzle going on the wooden board. It worked OK.
If you need to know a good place for laminating, let me know.
Hope this helps.
Puzzle Glue, made by Ravensburger, comes in a plastic bottle with a sponge applicator, you smear it right on the puzzle, goes on white but dries clear.
Sort of like Modge Podge that stuff you can get for crafts. You can usually get it at Ted's Hobby Shop in Pte Claire Shopping Centre, and in the same shopping centre there is a Frame and Prints store called Centurion, where they will laminate jigsaws. I haven't found anywhere else that will do it.
The only thing they won't do is laminate a shaped jigsaw, so for those I've had to buy a melamined particle board ( like the one I work on) , trace the shape and have a friend cut it out with his jig-saw cutter. Then I just white glue the whole puzzle onto the backboard.