Well, it turns out there is. Jason Hough runs the Galaxy Art & Entertainment Gallery which among it's other treasures features original Muppet comic strips (and other items) by Guy Gilchrist.
Guy is a personal friend of Jason's and donated his original Muppet comic strip artwork from ‘81 - ‘86, as well as some original merchandise artwork, and a few other items as well.
Not only do they have Gilchrist's artwork, but they also have puppet versions of Guy's original characters Tiny Dinos created by the Jim Henson corporation.
