Source for copper gaskets

[richarde]

Hi - I'm in the process of rebuilding an LT5 engine in the UK that has had plenum and injector housing porting plus a little porting to the heads to match the injector housing ports. The engine has been fitted with copper gaskets between the plenum and injector housings and injector housings to cylinder heads. I realise that it may possible to re-use copper gaskets provided that they are annealed, however, I wish to buy new. Does anyone know of a good source? The injector housing to head gasket thickness is 0.030".
Thanks