If you ask anyone on Twitter or in IRC, "I need a new power supply for my C64 or 128 or Amiga, where can I get one?" The answer always comes back to, you should order one from Ray Carlsen.
I haven't needed a new power supply, so I've never ordered one of Ray's. But I've only ever heard good things from the people who have.
It's a reliable power supply that doesn't need a "saver" to make it safe, and it will work with higher power consumption devices (like certain REUs). Laurence Gonsalves — Twitter, 2017
The most difficult thing about describing what he offers is the wide variety of models. In fact he builds custom power supplies, with custom features, so the options greatly exceed those sample models listed here and on his site.
The side images here show some examples of his work, and what you might consider to be "standard" models. The break down by price and quality seems to be as follows:
"BareBones" models consist of one or more "wall warts" which have their cables are joined together inside the power plug for the computer or drive. For example, a C64 needs both 5VDC and 9VAC. Each of these can be supplied by a separate wall wart, and then joined together inside one jack to be plugged into the power port on the C64. Cheap and cheerful, gets the job done, but it isn't the most beautiful solution.
A step up from BareBones are brick power supplies, very much like those that were used by Commodore themselves. The brick is made of a plastic shell surrounding the electronics. And a power cable that goes from the brick to the wall, with one or more cables from the brick to the computer. For example, Model P64-128 is a plastic brick, with output connectors for both the C64 and the 128. Only one computer can be powered at a time, but the same brick can physically be used for either type of computer.
And the step above that, consider these the deluxe models, are housed in a metal case. These models not only look the sharpest, but they can be used to power multiple devices, computer and drives, at the same time.
For custom options and to place an order, email Ray direct, and see what he can do for you and your Commodore's needs.