It appears that as of November 9, 2012 I have run out of monthly bandwidth on my Box account due to someone going on epic downloading spree (I take it as a compliment lol). As a result, downloading covers from that account will be unavailable until December 1, 2012. I will make an alternate account somewhere and upload all the covers there for backup. This might take a while though since there are over 2 gigs of covers to upload. In the meantime, if you would like to download any cover art I've made, feel free to PM me and I will email it to you.
UPDATE: Nov. 11: 32X covers are now available here (in addition to the Box account): http://www.mediafire.com/?5gm45wyxr3xvv