Well friends,
Having 30+ bikes across the years, I can confirm that this particular Beemer of mine is THE crap of them all. What a terrible mistake of mine (did I mention my latest OEM crappy friction plate problems? Don't ask...).
Anyway, a friend of mine has a GS here in Greece. He's after various mods (did the piston/rod thing, put a RapidMaybeYesMaybeNo and now has the R12S TB on sight).
He's lucky > found a "as-new" (really) full set at this incredible price on e-bay :
GRUPPO INIEZIONE BMW R 1200 S ANNO 2008 su eBay.it Motore e Trasmissione, Ricambi Moto, Moto ricambi e accessori
Now, he has the things that I need and I have a crappy bike that I don't.
Moral: Life's *****.