Anyone know where I can get a new chipset fan for the Rampage IV Extreme? Mine has broken blades. Or entire heatsink assembly (assuming it includes fan)

I've got a Rampage IV Extreme running ESXi 6u2, and I'd like to boot from the video card in PCIE_X8_2A or PCIE_X8_2B instead of PCIE_X16_1.PCIE_X16_1 has a GTX 960, as does PCIE_X16/8_3, I'd like to save those for VGA passthrough and use PCIE_X8_2A's...