Post #3
The rocker cover gaskets were, as said, not replaceable. The recommended replacements are made by a company called Thermotec. Can't see they've got any on eBay at the mo.
As for the rest.....
Inlet manifold gasket - 0349 G1 - marked as NFP on Servicebox
Water temp sensor housing - 1340 33 - still available from Peugeot, £2.78 Inc VAT
Injector o rings. Set of 2 - 1981 31 - still available from Peugeot but bloody expensive at £22.51 Inc VAT for a pair.
Get yourself onto Servicebox. Loads of info there....you can pick up the part numbers and use those to search the rest of the net.
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Cherry Red Rallye .... On going OEM spec resto
China Blue GTi6 .... Weekend toy
Black 208 GTi .... Wife's car now
Silver BMW 550i.... The executive missile