Thanks to the guys who replied, I was fortunate enough to pick up a black one (the white one on Bike Radar didn't suit!) on fleaBay for £7.50 - bargain!
I'm just about finished putting together my Mecacycle Turbo project but I need a nice saddle to complete it as the one I've got on it at the moment (from my Specialized mountain bike) is not very comfortable. The Flite is an obvious candidate as the original dates back to around the same era as the frame, but I'm not hung up on originallity - price, comfort and lightness are far more important!
Anyone got a Flite for sale at a good price? Needs to be in good condition but no need to be perfect so long as the price is right.