It could belong to the gear section, but with just with the humble B1four you can get pretty close.
OFC with an oil can delay it would sound better (cfr. video…)
This is also the best reason to own a Bass VI, but again, whatever: a baritone guitar, an octaver pedal… the spaghetti western tone/vibe is incredibly cool and so much fun to play around with. It is not about gear (yet)
On the VI, I’d start off on the 1st and 3rd pickup with that 4th switch (can’t remember what it does atm) down to make it sound a little thinner / guitarish.
To me at least, I think it needs to be twangier (if that’s a word) than surf. With surf, I think you need to dial in that delay a bit more so it doesn’t sound sloppy at speed.