For gluing canopies, indeed for gluing any part that will not come under stress, ordinary white glue is fine. There's something over here made by Weldbond, called More Than a Great Glue, a kind of super white glue that works great.
Watch crystal glue is also supposed to be fine for clear parts. It's available from Micro-Mark.
Airbedane try the following for the models you're looking for. If they don't have it, it probably doesn't exist.
http://www.rare-planedetective.com
http://www.squadron.com/