I think this might have got lost in the noise of 'Bike to a good home'. I bought this for Low Flying Brick's immanent conversion to an RT/LT hydrid:

https://www.ebay.co.uk/itm/bmw-k100-electric-screen-k100-adjustable-screen-1988/143287056156?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Anybody know if there's anything missing? You can ignore the state of the wiring - that's easy to fix - and due to the way that I tend to accumulate bike spares, I already have replacement speakers and speaker grills. I'll be changing the lefthand switch for one from either a Honda Pan-European or a Kawasaki Voyager as both have a screen rocker switch on. LFB already has Japanese switches on both sides.

All the important pieces appear to be present and intact.

Thanks Rob - much appreciated.