I've just ordered a a Mean Well SP-320-5 power supply from AVD. This is my first project so I'm after some advise - where can I find an enclosure I can mount this baby in? Want to keep the terms away from sticky fingers.
I've mounted a few of mine inside old computer cases. Of course this isn't water proof.
If you need a waterproof box, try an electrical wholesaler for 'adaptable boxes'. You'll then need to add ventilation, via a 90degree plumbing pipe to act as a air vent. Then put flyscreen/fine mesh over the vent so no bugs can crawl in.
Whatever enclosure you use, don't forget about extra space inside for the fuses, wiring terminals, etc. In a small box getting the PSU out again may become problematic if there's a heap of cable glands sticking out in the way.