You can get
this one at Circuit Zone. I got one for a client (and one for myself for testing), but the
online reviewsare less than stellar, so buy at your own risk. Unfortunately its the only 500 Watt, 24-pin PSU that I could find. Fortunately,
the client's PC is rather basic, with on-board video, so of course they not paying $1100 TT on a PSU. I just hope it lasts longer than
those that come with most cases.
At least they have 1 month warranty, so we'll see.