Lots of NOS parts on ebay in UK
 

I have no affiliation (and no experience with this shop), but found this when browsing the net:

https://www.ebay.co.uk/str/motoclass...at=69325891013

They state that they have puchased a lot of new gasgas parts lately and will list it here.
There are decals, plasics, frame & engine parts, fork parts etc. Even a top for a Sachs fork. Prices seem reasonable to me.

Thanks !