Thanks, I've PM'ed him
Ah I didn't think of that. There is an engineering place nearby, so if I don't have one by Friday I'll pop in and see if they can knock one up.
Unfortunately it's not a full stud. It's only the 'thread' bit of the stud - so there's no "head" bit to it, just the screwy bit - if that makes sense?
Additionally it's a non-OEM part (built by FreakyParts) - not sold by Toyota directly so I doubt they'd sell it on the shelf nor would they be able to source one for me. The Mr T near me is a bit naff and any amount of effort required on their part beyond punching a number into their database means they won't do it.