the -01's are what have the MK1's and lots of people mod them with the nordie dual coils, big singles or fat stacks...or possibly another bartolini would work for you too. there are lots of options out there, but i see nordies most frequently.
on the -02's, there are nordstrand options or other options, to include the Lakland/Hanson electronics, which are made in-house at lakland.
if you're not into the B string on a 5 string, maybe you could string it high? EADGC
nordies fit into the -01 without routing, and they also sound great, somewhere in the F***** field but in the high end. Woudn't be a direct replacement for the -02. But, there's really no need for this, because the MME/J config is something completely diferent. You could really try LaklandHanson LH3* or Delano or them BassLines, according to what your needs are.
also, I feel the 4 and the 5 model necks are way too different and, to me, the 4- neck is more comfortable
*I like Bartolinis alot in the 94 series but, in my current bass, I should say that after changing the pups (not the preamp) for the LH-3, my bass sounds closer to what I need
