If you want something premade, RL is fine, but they definitely are pricing their power supplies very high. Here is what they are using
https://www.ebay.com/itm/32441508809...YAAOSwWSxf1RS4

If you are comfortable soldering bullets, you can just do that, plus short 2 pins to make it power on when plugged in, and you'll have the same exact power supply as RL for 1/5 of the price...