A little help here?

I have a plea for the dozen or so people who still read this blog.

I need to source a new (replacement) brew switch for my vintage La Marzocco GS.
Sadly, the little plastic retaining tab snapped off (as they are likely to do).
And, of course, this part is no longer in-production.

It is the red "on" (or brew in fact) switch as illustrated below.

If anyone happens to have a line on such a switch, can you please let me know?

I've talked to the usual suspects, and no-one seems to have one.

Thanks in advance!