Missing Episode: His A-Team video game review was taken down due to copyright infringement (more specifically, a parody of the A-Team intro with the original theme music left in), but can now be found here, albeit without said intro parody.
His extras website (extras.ashens.com) used to lead to Stuart's page on the now-defunct video sharing site Revver. The videos formerly hosted there eventually were reuploaded to this channel by a fan who managed to save them.
To an extent, The Proxy could count as a trace of this. Each of the descriptions link to its Facebook, Twitter, and Wikipedia pages. However, the Wikipedia page has since been deleted.