Threadless
https://www.threadless.com/shop/@triagus/design/walking-bass#m
https://triagus.threadless.com/designs/walking-bass
TeePublic
https://www.teepublic.com/t-shirt/222974-walking-bass?store_id=5321
RedBubble
https://www.redbubble.com/shop/ap/15319449
