I owned a 2x3 Bush Pressman many years ago.(posted 9089 days ago)I've considered getting another 2x3 press camera (century or crown graphic) to shoot Kodak HIE film. There are a couple of films still available in 2x3 sheets, Ilford FP-4 is one of them. You might also consider cutting down 4x5 film to produce 2 sheets of 2x3, which is what I've been considering for Infared Film.
The 2x3 bush has a standard spring back(old graphic style) that is not easily adapted to a 120 back. There have been 120 roll holders that slip into the back, but they have a long film path with flatness problems and I understand are(were) not very reliable.
Unless you have an unusual shutter, the standard tapered cable release should fit.