I only found 3 from SuperMicro that will fit the bill:
RSC-RR1UE-AXL (PCIex8 -> 1x PCI-X) ($60-90)
CSE-RR2UE-AX (PCIex8 -> 3x PCI-X) ($99-140)
RSC-R1UEP-A2X (PCIex16 -> 2x PCI-X) ($90-110)
I've been told that some of the SuperMicro stuff is proprietary to their boards as well. I also got an e-mail back from PLX and they don't sell direct to end-users and wouldn't give me a list of resellers (odd). I don't really want to spend a lot of money either. If anyone is interested, I'm willing to trade both of my cards for one Intel Quad-Port PCIe card, two Intel Dual-Port PCIe cards, or even a mITX/mATX board with dual intel NICs. pfSense compatible of course. PM me if you are interested.