I've designed a new inlet manifold gasket, which I am currently manufacturing and have made a few extras which are available for sale.
By producing a gasket from PTFE (2mm thick), the gasket not only seals but also acts to thermally insulate the inlet manifold from the cylinder head, preserving a cooler inlet charge. Alloy inlets can be especially susceptible. Over on the Rallye Register a similar design was used to good effect with the S1 Rallye 8v inlet manifold and I'm looking to do the same with my C2 VTS manifold.
However, the gasket is designed to be completely compatible with the standard J4 stud spacing as well, so you could use it with the standard inlet should you wish.
Price is £35 per pair of gaskets + £3 postage. Available in the next fortnight.