Amazon.com: GODSHARK Internal USB 2.0 PCI Card, 5 Port (4 External & 1 Internal) PCI Expansion to USB 2 Adapter Hub Controller, High Speed 480Mbps for Desktop : Electronics
HP® Internal USB Ports (F2A87A)
2 Port, Internal USB 3.0 Card, PCIe - from LINDY UK
2 port Internal USB 3.1 Gen 2 10Gbs M.2 Card - Di-ARTs Technology
ASUS P8C WS Internal USB Ports - ServeTheHome
Enlabs MB20P22U310IN 2 Port Internal USB 3.0 Motherboard 20-Pin Header to 2x USB 3.0 A 10-Inch Female Adapter Cable,USB 20pin to 2 x USB 3.0 Splitter Cable -Black - Newegg.com
Compatibility between internal USB 3.2 connectors and front panel USB 3.1 ports | MSI Global English Forum
3.5 inch USB 2.0 Internal Card Reader + 1 USB Port | Techstar Computers
motherboard Internal Usb 3.0 20pin/19p Header To Type-e A-key Usb 3.1 20 Pin Adapter For Type C Front Panel Chassis Bracket - Pc Hardware Cables & Adapters - AliExpress
Amazon.com: ELECTOP 9 Pin 2 in 1 Internal USB Splitter Cable, USB Header Male 1 to 2 Female Extension Connector Adapter, USB 2.0 HUB Connector Port Multiplier PWM Fan (30cm/0.98ft) : Electronics
U3EXTEND | i-tec USB 3.0 Internal Front Panel Extender 2 Port | i-tec
Cases: USB 3.0 Internal 20-pin Male to Internal USB 2.0 Female Adapter Cable - Australia Computer Online
StarTech.com 24in Internal USB Motherboard Serial Port Adapter - ICUSB232INT1 - Serial Adapters - CDW.com
What is the internal USB used for ? | MacRumors Forums
DIY: Use the hidden internal USB ports inside your computer - YouTube
Internal Usb Port : 5 Steps - Instructables
Internal USB HUB (Gen 3) | PC Component | Gaming PCs | NZXT