http://bugs.winehq.org/show_bug.cgi?id=19510
--- Comment #2 from Vladimir vladimiroski@gmail.com 2009-07-30 11:15:20 --- There's not official website AFAIK, I'd updated the keyword & URL to the most stable source I found.
UHARC's GUIs are way more popular than the command line compressor. So it's easier to get a copy from an WinUHA installation or some other front-end.