In the mid-1990's, there was a coffee shop in Boulder, Colorado called
Caffe Mars.  It was one of the first internet cafes in the region, and
had a rotating selection of art on the walls.  One art installation
was from a local painter who did a series of funny paintings about
extraterrestrials interacting with earth people.  One of those
paintings was called "Welcome to Earth, Shorty" and featured a cartoon
cowboy shooting a stylized grey alien in the head with a six-shooter. 
I believe the paint used was acrylic and the size was roughly 16" by
16".  What is the name, current phone number, and address of the
artist who created that painting?