Add Todd Rundgren to the list of guys who have worn disco pants. Seems he was wearing them plenty around 1979, and while there are many photos online most are very small and have watermarks. Todd not only wore disco pants but also skintight leather ones and full-length spandex body suits. He was a bit like David Bowie but I’m not sure if he was really considered glam rock. I am most familiar with his music as a solo artist though he led a band called Utopia for some time.
Here is the best of what I’ve been able to find:
That’s about all there is that is good. If anyone knows of any more quality photos of Todd in disco pants please let me know. The middle photo features him on the right while another guy in the middle is wearing red disco pants. I don’t know who he is other than a member of Utopia.