FWIW, I bought a pearl pickguard from Musician's Friend for my '87 MIJ jazz that they said was for an Standard Jazz Bass, 10 hole.
Buy Fender Standard Jazz Bass Pickguard 10 Hole | Pickguards | Musician's Friend
It was REAL close, but not quite. Definitely close enough that trying to return it, and hoping to get a closer one would have been pointless. I took some 2-sided tape (non- permanent), and stuck the old guard on top of the new, lining up as many holes that would. Seven were dead on, two a tad off, and one, where the new guard was wider than the old on the top, didn't line up at all. I used a small drum sander to to re-shape the neck pocket, and remove ~1/8" of material that was overlapping the chrome plate for the knobs. After a few trips back to the garage to tighten it up a bit, it fit very well. I had to drill an 11th hole in the new guard between the pick-up and neck, and drill a tiny starter hole into the bass itself for the one screw. I know it sounds like a lot of messing around, but it looks like stock to me.
YMMV