This official Homestar Runner t-shirt was designed by Nina Matsumoto... I think she's improved on your methods a bit, too.
It's printed on soft, 100% cotton t-shirts from Canvas and District—the kind of shirt they'd print sloshy merch on. Each one comes with a prismatic bonus sticker.
|Unisex XS-4X||Canvas 3001|
|Women's XS-4X||District Made DM104L|
|Unisex 5X-6X||Port & Company 61|