According to the acresinternet site, they were chrome-plated aluminium bore. The damage to the piston & rings visible through the exhaust port, I'd say the cylinder is shot.
Those parts Joe saw on the net are from Canada - near enough to $200 inc. freight at their current price frown
Might stick it on Fleabay and see how it goes.
Thanks guys


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This is why some people appear to be bright, until you hear them speak!