Will bump this now and then until I lose the will to live ...
I have for sale the original, used-once 9v 2-band, four-pot electronic innards from a Warwick Rockbass Streamer NT.
NB: This came from a bass with active pickups. There's one used with passive pickups below. I can't discern any physical difference, but hey.
The part number is SP - RB125 and normally sells for a snadge over £50 plus postage from Germany.
Details here: https://shop.warwick.de/en/pickups/accessories-parts/bass-electronics/21366/active-electronic-for-passive-pus-vol-balmn250k-treble-bass No longer available?
Controls are volume, pup blend, bass and treble. Knobs available should you need them.
Pots marked as follows (wire wraps are labelled): Volume Alpha A25kΩ; pup blend (M?)N250K; Treble B 50K; Bass none found, presumed covered in solder! Everything was removed by a proper luthier, not me. Electronics mystify me.
So on the off-chance you have a Rockbass with four holes, and a broken preamp, this is your replacement.
It's vaguely possible you might think of another use for it but I can't, and I won't hold my breath waiting for suggestions.
Price includes delivery. Fill your bootses.