PCI Express 8 Pin (or 6+2) Socket Type

[sleemanj]

Does anybody know a model number for the PCI Express 8 Pin (6+2) Socket (pcb through hole)?

This is not the same as an 8 Pin Molex Mini-Fit Jr, the two add-on pins not only have a flipped "polarity" (the "square" pin is on the wrong side compared to those locations in the 8 pin) but there is an additional keying bridge between two pins.

The 6 pin PCI Express (or just the 6 part of a 6+2) is easy, but I'm having no luck finding any reference to a proper socket for the full 8/6+2