Is there no factory support or parts available? Maybe a newer controller available from the factory?
There are many options for retrofit controllers that would run the machine, but the problem will be the software. There is not going to be any off the shelf software that would run the machine. If doing a retrofit controller, someone is going to have to write the operating software.
EDIT: Given that the machine seems to be a 3 axis machine; Bending Plate (X, or maybe this could be an A axis), Clamping Bar (Y), Back Stop (Z) it could be operated with G-code and thus could use many common CNC controllers and software. You would have to hand write the G code for the part. I'm not aware of any CAM software that would generate the G code to run that machine, but I'm not up to speed on sheet metal software packages so something may exist.