i contacted tyga and they informed me that they had fairly modern gp 250 top fairings and tail unit and quoted me £500 inc postage, i'm almost sure.
they said it was suitable for the mc18 but with a bit of ingenuity it would fit. i contemplated this but the bike was in too good nick to cut up.
there is an mc18 which looks the business going tomorrow morning on ebay (search nsr-250), but be warned i saw this advertised before, and i think sold from liverpool area about two weeks ago. now it is up for sale again in london, hmmn, and could go for less that originally paid for and no collection just courier. the other thing that is strange is that the pictures are identical, what are the chances that someone buys a bike, inc ebay pics or sells it a couple of hundred miles away in an identical street...amazing. however, i could be mistaken and i wouldn't want to rubbish a genuine ebayer. this seller doesn't have any history either. so i'll be looking elsewhere. if someone is selling it from this site and it is authentic then i apologise.
thanks and good look.