StarTech.com 16 Port PCI Express Serial Card - Low-Profile - High-Speed PCIe Serial Card with 16 DB9 RS232 Ports - Add 16 RS232 serial ports (DB9) to your low or full-profile computer,
8-Port PCIe RS232 Serial Adapter Card - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
Low Profile PCIe 4-Port RS-232 Serial Interface Card - Sealevel
Digigram ALP882e Low profile PCIe card with 8x Line I/O
Amazon.com: StarTech.com 1 Port PCIe Network Card - Low Profile - RJ45 Port - Realtek RTL8111H Chipset - Ethernet Network Card - NIC Server Adapter Network Card (ST1000SPEX2L) : Electronics