Amazon.com: StarTech.com PCI Express to PCI Adapter Card - PCIe to PCI Converter Adapter with Low Profile / Half-Height Bracket (PEX1PCI1) : Electronics
IBM 5701 10/100/1000 Ethernet PCI-X Adapter for AS400
IBM 5713-820x 2gb Fibre Channel PCI-X Adapter | Flagship Tech
StarTech.com U.2 to PCIe Adapter for 2.5" U.2 NVMe SSD - SFF-8639 PCIe Adapter - x4 PCI Express 3.0 - NVMe PCIe Adapter - U.2 PCIe Card - Mount a 2.5" U.2
StarTech.com 4 Port PCI SuperSpeed USB 3.0 Adapter Card with SATA/SP4 Power - Quad Port PCI USB 3 Controller Card (PCIUSB3S4) - USB adapter - PCI-X - USB 3.0 x 4