So - Wiggle have come up trumps, and apparently a brand new shiny resistance unit is now on its way to me for the old turbo - which will then be as brand new.
However, even I don't have a place in my life for two turbos, since the Jolly Green Giant usurped this one's place.
Does anyone want to make me an offer before I put it on eBay?
It's the basic model with no adjustment (list price is £160, but Wiggle have them on sale for £112) - served me well....