Hey Malky
Yeah, all I've come up with within my price range is a artograph tracer. I can print a 4x5 picture and use it to transfer. Through Amazon, they are very reasonable. They make one that will reduce 80% and enlarge for larger size. I have some very old film camera lenses that I don't use anymore and might just try making something with them. Lots of adapters so I can reverse the lens if needed for the size I want. Something to play with.
The Artograph tracer style would work OK for me. I have a project coming up that I need accuracy on the project. My granddaughter is getting married this month and she wants me to paint her future husband portrait for a Christmas present. So, I'll have plenty of time to fill the trash can full with rejects.
Check out the Artograph ones and since you are more knowledgeable on things of this nature, let me know what you think?????
Maybe can skype later in the day if you are around.
Later