In my DIY Bass VI I got a set of (cheap) MIM Vintage 50's strat pick ups. I like how these sound.
So the set in the link you posted will do the job.
Original early Bass VI had a special designed single coil (strat alike) pick up with metal pick up rings. Later this changed to a regular Jaguar pick up with the claws. (and the addition of the strangle switch)
Imho the subtle changes of pick ups are less noticeble in a Bass VI. I tried both Alnico III and V , raised and flat pole pieces in my VI. And used them in home and band settings and really it wasn't that audible. (When compared to a guitar) I finally setled for the Alnico 5 MIM 50's strat set.
I even had cheap ceramic pick ups in the VI and those delivered as well. (perhaps a tad harsher, but not really in a bad way)
The real audible change I heard was Roundwound strings vs Flatwound strings on the VI. And the woods used for the neck and body. This has a much more audible impact imho. (But that's another topic)
For your Jaguar I think the pick ups will make a much more pronounced differance.
I'm no expert on these, (far from it actually) but there is quiet some good stuff out there. The Fender Pure Vintage '65 Jaguars pick ups get a lot of praise here. And ofcourse the boutique guys like Lollar, Novak, Pick up wizard (just to name a few) have already set their mark.
Keep in mind that there are 2 different sets of Jag pick ups out there (if you want to stay close to the originals);
those based on the "62 model, described as a bit darker with more focused mids? (if that means anything to you)
and the "65 model, more trebly, less tight in the mids. (Again this is all subjective and hard to describe)
I think the above are very well described on the Pick up Wizard's web site. (I also think he has sound samples of the differen sets) Get's you an idea on what to expect.
Though, I guess these days you can get whatever you desire, depending on your budget.
