I run a 3rd gen 4runner booster out of the junk yard. It is a bit larger diameter and covers one of the mounting bolts for the clutch slave - but it works great. I have disc brakes all around. I believe a booster is a booster. It is the brake master where things get to be important with regards to disc brakes and propotioning valves.
If the mini truck booster has served you well, get. A new one to replace it, install it and run it.