DJ $crilla hasn't posted on GC for a few years now, but he's a SigEp who recorded a bunch of tribute songs for various GLOs. IIRC, he was a big hit because he actually made the effort to learn key facts about the GLO and he included all that in each song.

I think his manager used to post here as well.

I wouldn't know where to look for current links, but like any musician -- if he's still doing stuff, he might have a MySpace music page up.