Vision 3A-243WU12 Linear Switching Supply IN 100-127V-50-60 Hz 0.6A OUT 12V- 2A | eBay
NuPrme LPS-212 12V Linear Power Supply
AC to DC Adapter Converter 3-12V 2A Adjustable Power Supply Motor Speed Controller with EU Plug
HIFI AUDIO Ultra-Low Noise linear power supply 25VA LPS output DC 12V 2A, provide clean power for upgrade your device - AliExpress
Amazon.com: SUPERNIGHT 12V 2A Power Adapter Supply AC 100-240V to DC Power Supply DC Jack 5.5x2.1mm for Led Light Strips, String Lights, Router, CCTV Camera Security System : Electronics
How to Build a Linear Power Supply - Circuit Basics