@Martin: as you know i'm trying to find some repair solution but when.....apart from that to repair one you need broken ones and even those are hard to find :) (i have one now which isn't stuck but has a broken coil for a change).
But as you know i'll keep you updated if finally anything pops up (from the far east).
@Stonk: the owner of the radio said it was never repaired (so it originally came with the Vifa unit ?) but i know the other beolits i have here are with Seas speakers.
But from this radio the diagram and enveloppe was gone so maybe the owner forgot a repair...??
No reply from Vifa as yet....
What i want to keep sort of secret (before all is gone): at German Ebay there's an Ebay shop, a guy sells the plastic clips (black and gey) and volume/tone knobs (silver) new old stock for i have to say quite fair prices.
Got my stuff yesterday, including antenna but this one doesn't seem to be original, probably not going to fit and doesn't come with the typical alu tip.
So anyway, anyone with broken speakers: don't dump them ! :)