I think i ve heard of people making up there own copper gasket like they do for old car heads. Don't have a clue how it's done but that would be one way of doing it.
Life's journey is not to arrive at the grave safely in a well preserved body,but rather to skid in sideways totally worn out shouting WHAT A RUSH, WHAT A RIDE.
"Life is a tragedy when seen in close-up, but a comedy in long-shot." Charlie Chaplin