Hello Again.

Has anyone got any idea where I can get the two cylinder head o rings from or an alternative that I can use.

Thanks

 

I make difficult-to-obtain O-rings from cord stock and join the ends with cyanoacrylate (Super Glue).

To give you an idea, here's a source for such in the US: https://www.marcorubber.com/o-ring-cord.htm

Try searching "o-ring cord stock" to find a local supplier.

Might be a long shot but try Rathmells