Hi,
Having just bought and fitted some to our 1990 Swift Challenger, I can recommend the Remi-Flair ones we ordered through our local dealer, Cranham. They were delivered to the shop in a few days and fitted really easily - ordered the standard width for the window and then cut the side-tracks to fit the height !
However, I think the blinds more like OEM stuff are the Seitz ones - the only place I found to buy them from was OBriens Camping at ⇨ http://www.obrienscamping.co.uk/Seitz.htm
Anyway - couple of options for you !
Cheers
Andy