Found another Toyota one that looks interesting. Has a 4 bolt pattern as well and looks like maybe top and bottom ports. One picture I've found shows senders of some sort in the bottom and bushings in the top, might be able to swap the bushings to the bottom.
https://www.rockauto.com/en/catalog...276387,brake+&+wheel+hub,master+cylinder,1836
View attachment 1716080367
Edit: Did a little more searching and it appears the Toyota 4 bolt pattern is 75mm x 45mm compared to the Mopar pattern of 3.25" x 2" (which is ~82.5mm x 50.8mm). So it's not a big stretch to make one work assuming the numbers are correct, but it would take some milling/filing of holes. Looks like there is a decent amount of metal to work with as you'd only be going out ~1/8" horizontally and 1/16" vertically on each hole. Also seems the bottom ports for the sensors on that FJ master aren't the same size as the top, so not quite so straightforward to swap parts to make it bottom exit. I'm betting you might still be able to find an adapter out there though. Guessing it's just 1/8" NPT, so if a 1/8 NPT to 1/8 inverted flare exists that would be fairly straightforward.
