Here are a few flyers done for us back in the early 80s by various members of Monitor, plus an ad they designed for "Flipside" magazine.
The Meat Puppets will always owe a huge debt to Monitor, who took us under their wing back when we first started visiting Los Angeles. They put us up at their house, got us gigs, fed us, and even released our first record, the "In A Car" EP. They also invited us to play on their album. Our version of their song "Hair" appears on the reissue of our first album, but unfortunately the record itself is out of print. (You can find an article I wrote about it in "Lost in the Grooves: Scram's Capricious Guide to the Music You Missed". )
I no longer recall exactly who did these flyers, though memory tells me that Laurie O'Connell and Steve Thomsen usually did the collages, while Michael Uhlenkott generally handled the drawings of skulls and tikis. You can find more examples of their fantastic work over at the Herb Lane Museum. (By the way, that single by "The Tikis" is actually Monitor under an assumed name.)
Also, be sure to check out the "Lost In The Grooves" blog over at Blogspot.