Zazzle was the only site that had a black t-shirt with white writing.
These book bags came from Society6. They have the image on both sides.
Etsy.com listing beautifully produced and sent by Printswell,com
I found a reputable site that does a nice job of Print-on-demand (POD) with choices of color, size, and style. I have tested the quality of the shirts and bags and the printing and have been happy with the result. T-shirts sell better on ETSY,COM (algorithms!) Some popular options are listed there, printed and sent directly from Printswell.com. If you have a favorite card design you don’t see there, drop me a line and I can probably upload it for you to purchase. Printswell does not offer returns unless there is a mistake on their end.
I also uploaded designs to three reputable discount companies, and each has sales on something or other on any given day, sometimes 30% off your first order as well, so you can shop around for the best price. Some only have certain things (Society6 doesn’t have kids’ t-shirts for example, only Zazzle had the black shirts with white writing). I wanted to make sure you had safe places to shop with easy returns (I easily returned a Zazzle 100% cotton T shirt that was too small).
I don’t have resources to produce a variety of products myself, and this keeps me in my happy place of playing with ideas. I ordered a few of the chicken card images from Society6 as posters for my studio! And I wear the “Calling in Sea Sick” (etsy) every time I visit Florida!