Cisco originals are EOL (End Of Life) and no longer available and almost impossible to find. It's almost the same and works fine. And for less money than the originals cost.
Mikrotik RouterBOARD 951Ui-2HnD RB951Ui-2HnD: High-Power 2.4Ghz Wireless AP with 5x10/100 Ports and OSL4
73 Review
MikroTik RBcAPGi-5acD2nD-US: High-performance Dual-Band 802.11ac Access Point
35 Review
MikroTik Dual-Concurrent Access Point: hAP ac Lite RB952Ui-5ac2nD-US
79 Review
Wi-Fi signal amplifier (repeater) TP-LINK TL-WA860RE, white
21 Review
UGREEN USB 3.0 Ethernet Adapter Hub with RJ45: Fast Gigabit Ethernet Converter, 3 Ports USB 3.0 Hub Compatible for MacBook, iMac, Surface Pro, Chromebook, Laptop, PC
11 Review
π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
π Juiced Systems Silver BizHUB USB-C Multiport Gigabit HDMI Hub with 3 USB 3.0 Ports, Gigabit Ethernet, 4K HDMI, SD/Micro SD, and USB-C Power Delivery
11 Review