| IOGear (G-UC232A) Serial Adapter 0.5 Mbps, External Adapter, USB 1.1 Interface, Cabling: Serial RS-232, USB, Cable Connectivity, For: PC Platforms | $19 - $37 from 9 stores | | Quatech SSPXP-100 Serial Adapter 0.9 Mbps, Expansion Card, PCI-Express, ExpressCard/34, ExpressCard/54 Interface, Cabling: Serial RS-232, For: PC Platforms | $86 - $109 from 3 stores | | Belkin (F5U504) Serial Adapter 400 Mbps, Internal Adapter, PCI-Express Interface, Cabling: IEEE 1394, Cable Connectivity, For: PC Platforms | $62 - $71 from 5 stores | | |