StarTech.com 5GbE USB A to Ethernet Adapter - NBASE-T NIC - USB 3.0 Type A 2.5 GbE /5 GbE Multi Speed Gigabit Network USB 3.1 to RJ45/LAN - USB A to Ethernet
QNAP QXG-5G2T-111C dual port 5GbE multi-Gig expansion card;Aquantia AQC111C;Gen2 x 2;low profile - Walmart.com
QXG-10G2TB | Two 10GbE ports, supports up to five speeds (10GbE / 5GbE / 2.5GbE / 1GbE / 100MbE), and maximizes your NAS and PC network connectivity. | QNAP (US)