The GRex isn't available anymore as it is a discontinued product but we have Mediator busboards in stock now:
However the
Mediator SX is, this is 6-slot PCI and can be used with an ATX PSU.
The smaller
Mediator LT4 is 4-slot PCI
The latest tower to use the Mediator range with is the
D-Box 1200 tower system
