From all that I have checked, RA60 and TE72 are definitely the same spline (about 1cm different in length though). I just assumed RA40 would be the same, but I could well be wrong.
So it is the RA60/T18 ones I am really after.
Matt, it's a little hard to get to Bayswater during business hours. Maybe Saturday. Depends on what you're asking for them too.