I'm not sure how many actual vendors there are. I would get onto somewhere like Rimmer Bros or Island 4x4 and see what brands you fancy. If you've heard of it, it's going to be OK.
Presumably the old gaskets were tin gaskets, so you'll have to skim the heads by about 0.5mm to allow for the extra thickness.
I haven't collected the Landy yet, it's a new purchase, so unsure if it's tin or composite!
If I'm really lucky, it's tin and the CR skim will also take care of any warping!
Thanks for the answer, I'm new to RV8's so lots of question will be arriving, either here or on the Forum.
And while I'm thinking of it, I've read that a overheated engine can have a damaged oil pressure relief valve, how easy are these to change? Esp. in a series 3 Landy?