We have both Auditronics 2500's and a newer Wheatstone made R-55. Without hauling them out of the racks, memory is both supplies are third party OEM units that remain currently available. Maybe same for the R-60.
The 2500'ssupplies were modified to mount inside the consoles--mine are now externally rack mounted for better ventilation. Wheatstone also sold us a rack mount supply for one of our 2500's that was obviously originally designed for a different console. If you can figure out the current demands for your R-60, there is probably a work-around to use comparable OEM supplies. Mouser has the square multi-pin crimp connectors used in some of the later Auditronics consoles for the DC wiring harnesses.