"Right hand gasket is finis 1046543 (for reference left hand is 3994773.)" Courtesy of stenasev
I only need the one so i only did a quick internet search and asked at a couple of motor factors whilst i was buying other stuff. You could try usaautomotive but I didn't think i would save enough to make it worth it once you factor in postage ( my dealer is local).
Also after reading some threads people really rate the OEM head gaskets.
Hopefully i'm pulling my head tommorrow to see what damage i've got. I'm praying for just one valve, and i have a spare head to steal one from.
Regards