Simon, Just done this on a Scura, also a single plate clutch, the single friction plate is no longer available so we replaced it with a used twin plate assembly with new plates, you will need the flywheel and all the clutch parts inc a new spline hub, we could not find a new hub in the UK so got one from Teo Lamers, all the parts new come to about £1500, Gutsibits have got a complete used clutch for £380 plus £90 for new plates, we removed the engine and left the gearbox in place, if you need any more info just ask
we were told that the Ram clutch is not available, you don't need the alignment tool to take it apart but you need it to assemble the new twin plater