I know that it's from someone who was on BI.org... hang on, lemme check.
Someone called Drogen. His site is here:
http://www.furbid.ws/cgi-bin/auction...w.pl?user=Grey
I doubt he does inflation often, but he was commisioned for it and posted it on BodyInflation.org.
He also did this BE comic:
http://img54.imageshack.us/img54/1852/animeberayvu1.jpg