Broken Halos is the best Vigil page out there. It's home to the new publishing company of Vigil's Dark Utopia series and his newer Broken Halos series. From this site you can buy comics, prints and original artwork. Check it out and support this new publisher.
Avatar Press publishes a lot of Tim's more 'high-profile' work such as 777: The Wrath, Faust/777, Raw Media Mags, Cuda, and the upcoming full color Faust: Book of M. His work has also appeared in their anthology title, Threshold. Again, you can order comics and special edition variants off of their website as well as check out some preview art.
Raw Comics is a great comic store that has a very large selection of Tim Vigil/Rebel Studios and related books at very reasonable prices. They also have original artwork for sale as well as a large selection of other comics and related stuff,