Since the Land Rovers have flat windows, I thought it might be possible to do a (semi-) transparency set for them - so I have. It can be printed out onto an OHP sheet and then they can be cut out and mounted behind the appropriate cut-out areas on the body. For anyone who wants fully-transparent windows, just use these as templates to cut out the pieces of clear plastic.
Email me for a copy of these. (Website below for email address)