I posted this on the mechanic's corner but ain't got alot of input.

As some of you know I just bought a "new to me" 2004 Procraft 210 Super Pro with a tandem trailer. The trailer has hydrolic surge brakes and a folding tounge. The actuator master cylinder is bad. The actuator is a Tie Down model 70CL with the button style coupler latch. Either they don't make this actuator anymore or I'm too dumb to find 1. All the actuator components are inside the tongue. Low profile...

Does anyone know where I can buy an actuator that will work with this tongue/coupler? I looked at the Tie Down 70LP but am unsure if it is readily available or will work. I will replace just the actuator master cylinder if I can but will replace the whole coupler if I have to.

I've already had 1 close call when a truck with no brake lites stopped real quick in front of me & I REALLY wanna get these brakes fixed!