Hi mate, I know you're not having a canopy on the finished item, but if you want one, to fit in the open position, I MIGHT be able to get one, and possibly a windscreen, with (mock) internal armoured glass. These are from one of the full-scale taxiing mock-ups built for the 1986 (?)TV series 'Piece of Cake', and I believe these parts were made by the same company who make the new ones for genuine aircraft.
The current owner aquired the 'MkIX' a few years ago, but the idiot cut the wings off to transport it, rather than unbolting the space-frame assembly, and the whole thing started to rot due to standing out in the open. I tried to convince him to restore it, offering to do a lot of the work myself, for free, when available, but he ended up dumping it on his land. The canopy was cracked, but he had a spare, and the windscreen, if not dfamaged since I last saw it, could probably be removed I think.
I can't promise anything, as I haven't seen it, or him, for a little over 18 months, but I can make enquiries if you're interested.
Terry.