Amazon.com: NVIDIA Quadro FX 4800 for Mac by PNY 1.5GB GDDR3 PCI Express Gen 2 x16 DVI-I DL, DisplayPort and Stereo OpenGL, DirectX (Boot Camp), CUDA, and OpenCL Profesional Graphics Board, VCQFX4800MACX16-PB :
PNY NVIDIA QUADRO FX 5600 1.5GB DDR3 DUAL DVI VIDEO GRAPHICS CARD MAC EDITION | eBay
456139-001 | HP 1.5GB 400MHz PCIe Nvidia Quadro FX5600 Video Graphics Card
nVidia Quadro FX 4800 on Mac Pro
NVIDIA Quadro FX 5600 PNY VCQFX -5600-PCIE-T | eBay