Haha... In case you need really slow PCI Express: https://www.startech.com/Cards-Adapters/Slot-Extension/PCI-to-PCI-Express-Adapter-Card~PCI1PEX1
@dashie Yeah, I had seen those too...
@galaxis they asked only if they could, never if they should
thread on TPM-is-really-ISA-under-the-name-LPC
@galaxis Tangentially, in case you haven't seen this thread
it's pretty amazing. So maybe you can find a PCI Express to ISA adapter and hook it up to your TPM/ISA/LPC lines.