Well and then I changed my mind again
I found the perfect bridge for this bass:
A Duesenberg two point bridge. It is adjustable in all possible ways: string spacing, individual saddle height, back and forth for intonation and of course the the bridge in its entirety can be height adjusted. Excellent!
I bought the tail stop that Duesenberg offers for their basses too.
That was a bit of a wild guess, but my plan turned out exactly as I had hoped.
Here's what I did: I installed the tail stop straight at the bridge itself. So now the bridge and tailpiece look as if their one.
Between the tailpiace and the top of the body I placed a piece of black foam. Same stuff that is often used underneath pickups.
And with the replica bridge cover (that I bought off Ebay) placed over the new bridge configuration it looks very convincing.
So now I have my longscale EB2 ready to rock!