I've a piece of flexible double-sided that I could post to you
if you're in England.
(It's what I use for a similar purpose (with a shorting switch) when
I've a bit of electronic eqpt that only has a single push-button for
both OFF and also ON and which therefore otherwise slowly
(OK, very slowly, but a problem if not used for months on end)
drains the battery during its eternal monitoring.)
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