The Toroidy transformer has 2x45V (15.6A each), and 3x15V (2A each) secondaries. This is a custom Audio Supreme model.
For the high voltage rails, I used two Universal Power Supply boards from DIYAudioStore.com. These are stacked with the first feeding the second. Both of these boards have the resistor bank populated, so the supply acts as a CRCRC: 13,600uF -> 0.5ohm -> 33,600uF --> 0.05ohm -> 20,000uF. This is for each of the two rails. On my house mains, these deliver just under +/- 70V rails.
For the low voltage voltage rails, I used two PCBs I bought from Jim's Audio. These are also stacked and daisy-chained. Since these boards aren't set up as a CRC supply, I used a resistor in between the two boards to connect the output of one to the input of the other, so these have 13,600uF -> 1.5ohm -> 13,600uF for each rail. These +/- 20V rails feed a linear regulator on the buffer board.
For the gate drive (15V referenced to the negative high voltage rail), I used an Omega11 discrete regulated power supply board purchased from AMB Labs.
All the components for all these boards were purchased from Mouser.
These supplies power a single channel monoblock, so this is replicated for each channel.