I've got an '88 MC18SP which I have been trying to do up. I recently totalled the motor and getting new parts is proving to be a nightmare. I have bought both right and left Rothmans side panels NOS but cannot get a nose fairing for love nor money (would prefer paying money).
Trying to find a crank and barrels is very difficult - I have just got hold of an ex-race bike (see topics close to this one) and taken a punt that the engine might be OK. If you find you don't want the SP and the engine is servicable I would be interested - I guess the NSR bug is getting to me......
On the plus side, before it blew I was having a great time and now I have two unfinished projects of uncertain provenance to prat about with.