It looks like those Vektek sensors should do the job (as long as they actually work as advertised).
The presser sensors are connected(cable) to the transmitter(on the machine head somewhere).
The transmitter is passively powered through wireless from the receiver, which is wired back to the master control unit for power and machine interlocks.
https://www.vektek.com/Members/PartsLists/Documents/en-us/PL/PL3305.pdf
Yes I read the manual today and it looks like it should work. I contacted Vektek with some questions and included some video of our process.
Since one transmitter can connect to 4 sensors and one master control unit can connect to two receivers I'm thinking we can use one master control unit per machine. That would work out perfect.