Thank you for looking into this. I agree that it is likely the same person. When I googled, that twitter account did arise, as did fb, linkedin and github. I did stumble upon another email address, and I just sent a message there. Twitter's a bit out of my comfort zone.
I hit him up on Twitter with a reference to this thread, letting him know that if he's the right person you're looking to contact him. No telling if he'll respond. I imagine if he's this hard to reach about the module he won't mind having another maintainer anyway.
Thanks for the effort. About a week ago, I updated the OP, but no doubt it is easy to miss. I am now a co-maintainer. I was unable to contact the author, but I was granted permissions by the powers that be. I uploaded a new version of String::LCSS.
Ironically, it was toolic himself (amongst others) who advised me how to do this 5+ years ago in this PerlMonks post prior to me taking one over, so if he hasn't asked for ownership yet, he definitely knows the process ;)