I found these Electric Mayhem costumes surfing the web. Outstanding really. They even performed. They won the Best in Show Master's Category Award.
Here's a pic,
http://www.teamdavinci.com/dragoncon/pages/Dragon Con 2004 372_jpg.htm
And http://www.teamdavinci.com/dragoncon/ has more.
http://www.usagichan2.com/Dragon2004/events-masq4.htm
http://www.501st.ca/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id=105
http://www.west-of-the-moon.net/images/muppets2b.jpg
http://www.teamdavinci.com/dragoncon/pages/Dragon Con 2004 408_jpg.htm
http://www.teamdavinci.com/dragoncon/pages/Dragon Con 2004 330_jpg.htm
Here's a pic,
http://www.teamdavinci.com/dragoncon/pages/Dragon Con 2004 372_jpg.htm
And http://www.teamdavinci.com/dragoncon/ has more.
http://www.usagichan2.com/Dragon2004/events-masq4.htm
http://www.501st.ca/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id=105
http://www.west-of-the-moon.net/images/muppets2b.jpg
http://www.teamdavinci.com/dragoncon/pages/Dragon Con 2004 408_jpg.htm
http://www.teamdavinci.com/dragoncon/pages/Dragon Con 2004 330_jpg.htm
Welcome to the Muppet Central Forum!
Christmas Music
Macy's Thanksgiving Parade
Sesame Street debuts on Netflix
Back to the Rock Season 2
Sam and Friends Book
Jim Henson Idea Man
Bear arrives on Disney+

Rowlf plays the harmonica in the Muppet Movie if I'm correct. When they are in the desert sitting by the campfire.