Small 12vdc supply compatible with the 3PD in-line dimmer modules?

I asked a question related to this here: LED gooseneck lamp controllable by a RR-3PD?

Which was probably the wrong subforum.

I checked the supply feeding the existing lamp and it's rated for 12vdc at 500ma. So it's a pretty low draw lamp.

Any suggestions for a 3rd party power supply that'd be compatible with a 3PD in-line dimmer?

I can replace the whole cord if need be. I'd like to get something suitable for being accessible, not the kind of screw-down mounted power supply you'd typically use for under-cabinet lighting and the like. I'd be willing to cannibalize another light if there's one that uses 12vdc and is known to be dimmable with the Lutron in-line dimmers.