So.... a long shot!
I have a Rickenbacker-shaped thing on order. It has a Jazz pickup in the neck position, and enough space for another jazz pickup in the traditional Rickenbacker bridge position. I plan to use two Jazz pickups as they are a standard design.
I realise I'm trying to make something sound like something else, and nothing sounds like a Rick (etc etc, ad nauseum), but IF you had to chose a noiseless Jazz bass pickup for a Rick-type tone, what would you use?
I've been recommended Dimarzio Ultra J pickups in other places.