Cheers gents. I'll get in contact with Redline and see if they have them.
For Mcgills I would need to know the details (bore size, thread size/pitch etc) which after scouring the various manuals I have, they aren't listed.
EDIT:
SamC, superb!! Thanks. I'll get them ordered. I take it fitting is a simple as jacking the car up, removing the wheel and unbolting the pushrod?