UPDATE - The tees have arrived! The 20th anniversary Underworld tee is my design via Redbubble. As is the Captain Beefheart - Safe as Milk print.
The Klaus at the Moog and Brian Eno prints are courtesy of Night Channels. Printed and shipped in 7 days, and very affordable.
For my next order I'll be picking up Tangerine Dream's Zeit and a few other classics.
These will likely be worn with a black corduroy blazer, dark denim and my favorite dress boots. Casual but smart enough for a day's outing for spring/summer or for crate digging in a dusty old shop.
Here's John Peel wearing the same and pulling it off nicely.