You can order the T-Shirt from my Redbubble store.
I was just a suburban kid on the other side of the USA in the summer of 1967, buy hey I still went to the mall and bought bleached bell-bottom jeans!
Later on, I did live in the San Francisco Bay Area, and indeed I attended many a Grateful Dead show. Plenty of fun was had, to put it mildly.
This summer, the City of San Francisco is primed to celebrate the Summer of Love all over again. See you there with flowers in your hair.