Just been to my local Morrisons and I picked up three boxes of Disney jigsaw Puzzles. King International make.
Normal Price £2.48 - which itself is a bargain, but now on sale for 48p. I got the following:
Mickey Mouse - 50 pieces, age 4+
Peter Pan - 50 pieces, age 4+
Jungle Book - 100 pieces, age 5+
I don't think this is available on-line- but I will check.