https://www.guitarworld.com/news/les-claypool-faces-off-with-metallicas-robert-trujillo-in-a-bass-slapping-duel-in-new-short-film-precious-metals#:~:text=Les Claypool has unveiled a,bass battle for the ages.
GK Backline - all three sizes (10"/ 12"/ 15") suitable for home use. You can pick one up for under £150.
Ashdown Evo combos - I've seen the 180w sell for around £100.
I may be wrong (happened once before) but I think that you can safely use a 5 string pup as they will still create the EM field that you need.
IIRC there was a 4 string bass on here with 5er pups.
Lots of great basses available for not too much money...
Makes you wonder how companies got away with turning out expensive mediocre gear in the past..