Driveline drum parking brake, spring applied, elec released

I am doing some major reworking of my coach and would like to investigate replaceing the manual lever/cable application system with a spring applied/electric release operation of my driveline parking brake.

It will be used on an Allison 1000 transmission. It is my understanding that this system was used on some coaches, but I dont' know which ones or who the supplier of the brake actuation/release system was/is.

While my coach does not have air brakes, I am also considering adding a small air tank with a small 12V compressor for an air horn (already exists) and misc. uses. It could then also be used to release the parking brake.

Any leads to possible suppliers would be appreciated.