Thanks for all the input.
Since it's more complex that I thought and the likelihood of ruining a perfectly good bass is high, I'll just go back to comparing 5-strings online and see if I can find one I like.
Good choice. I have seen many a bass ruined on ebay, one of which was a Fender Urge.
I'm guessing at 32" scale, the low B would have also sounded horrible. I tried one a long time ago and the spacing was too narrow for my tastes and I typically like narrow/medium spaced 5ers. On your average 19mm spaced bridge, that makes the string spacing about 14.25mm. I would only be able to play something like that with a pick.

