First song I played at a gig on bass was "Back in the USSR". I'm pretty sure we then did an original instrumental called "I love you so much I can't shit".
When I was looking for an extremely tall stand for a Warwick Buzzard, that was the tallest I could find (and the grabby bit disintegrated after a little while so I don't think much of them).
Could you fashion something that the strap would hang on with a cradle of some sort to stop the neck pivoting round the securing screw?
Or maybe you could just swap the EUB for an Omnibass.
But if a low D (below bottom E) and a D on the 5th fret of the A string are played, you can tell the difference and that the low D is lower than the next D up. So although the fundamental may not be coming through, your brain can work it out.
I'm not sure that any of my active basses with passive pickups (all of them except the Warwicks) have buffers prior to the blend. My Sei Original did originally (see what I did there?) have a Bartolini preamp that buffered the pickups prior to the blend, but it went titsup so got replaced by a Delano that doesn't.