I'm delighted to have been accepted by Merch Amazon as one of their designers. Below is my YorkshireLad brand which is Yorkshire phrases on t-shirts.
I'm also experimenting with a Paul Butterworth Artist brand for printing my paintings on t-shirts in America and have put one up as a trial. If anybody would like any on English Amazon (or a particular painting) please let me know.
Here's my Redbubble shop that sells my paintings on merchandise.