Found this thanks to my Daily Grindhouse buddy Heavenztrash. The Monster Squad's How-To Guide To Kill A Monster by Dave Perillo. Done in association with Crazy 4 Cult to be sold at Gallery 1988, the print appears to be sold out (not a shock considering it was limited to just 55), but maybe you can find it on ebay one of these days.
I've been holding off watching The Monster Squad this week (launched my October Horror A Thon with Fred Dekker's Night of the Creeps). It's one of my favorite kiddie horror classics and I'm thinking I'll get to it next week.