@Bassworship1 - did you ever consider having Keith put in single coil Bart P4s (or whatever a preferred brand might be) into your myrtle SKB? It wouldn't exactly be a jazz bass, but it could provide you with that single coil tone. If you don't like them, I'll buy them from you.
I've actually never heard of them. Will see what I can find on them.
waiting for Keith and son to return had/have quad coils as I see two leads from each of them taped off at the end.