With the help of some references from Geoffs 250GTO thread, I have found side indicator repeaters at
http://www.ebay.de/itm/Seitenblinker...a-Fulvia-Coupe.
I am looking at two possibilities for side window glass - glass from the Z3 coupe available from america at $150 each (plus postage and duty) or lexan windows from Plastics 4 Performance (uk)
www.lexan-windows.com/ at £90 each. The coupe has a different glass profile which might work.