for 650 quid (including postage) just got me my sp forks completely rebuilt (including straightening and rechroming) with Maxton GP-2(?) cartridge internals . A bit pricy but in the long run I think about same as tracking down SP or SE forks in good condition....Although I now have a set of SP forks and half a set of SE forks sitting on the shelf next to the rvf400 frontend that I have just taken off the bike.

Hardest thing I had was trying to find stantion tubes in good condition hence the spare forks....

C13