SHINESTAR PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC with Low Bracket - NWCA Inc.
5X PCI Express 2 Ports Serial RS232 Com Db9 Controller Card PCI-E 1.0 X 1 WCH382 Chip With Low Profile Bracket - AliExpress
PCI-5S2A PICMG 1.0 Full Size Passive Backplane with four PCI and one ISA Slots | Industrial PC Pro
1-Port Ethernet PCI-Express x1, Revision 1.0a Also Includes Low Profile Bracket | eBay
2 Port DB9 Serial and 1 Port DB25 Parallel PCI-e 1.0 x1 Card | eBay
2-Port USB 3.0 PCI-Express Card, x1, Revision 1.0; Etron Chipset EJ168A with Full & Low Profile Brackets - Walmart.com
IOCrest 2 Port DB9 Serial and 1 Port DB25 Parallel PCI-e 1.0 x1 Card, 1 unit - Dillons Food Stores
PCI-7S PICMG 1.0 Full Size Passive Backplane with four PCI and three ISA Slots | Industrial PC Pro
AXT Used PCI-R1604 V 1.0.2 PCI-R3210-KP V1.0 PCB-I-E-1558=6DX2 | eBay
NVME M.2 SSD M Key to PCI-e 3.0 x1 host controller expansion card, supports M2 NGFF PCI-e 3.0, 2.0 or 1.0, NVME or AHCI, M-Key, 2280, 2260, 2242, 2230 SSDs low profile bracket - Newegg.com
PCI-8S-RS PICMG 1.0, 7 Slot Backplane with 4 PCI Slots | ICP America
PCIe Gen 4 vs. Gen 3 Slots, Speeds
Amazon.com: IO Crest 2 Port Serial PCI-e 1.0 x 1 with Full and Low Profile Brackets SI-PEX15037 : Electronics
PCI-10S PICMG 1.0 Full Size Passive Backplane with four PCI and five ISA Slots | Industrial PC Pro
PCI-X - Wikipedia
Amazon.com: GODSHARK PCIe Serial Expansion Card, 2 Port PCI Express 1.0 x 1 to Industrial DB9 COM RS232 Converter Adapter Controller for Desktop PC (Will Also Work on PCI-E x4, x8, x16