I would suggest that FReeQs might join me in making and wearing Q T-shirts with WWG1WGA or just Q or something on them. That way, no one is profiteering from it.
A t-shirt is cheap and easy to paint. You can do it freehand or with stencils (also cheap). A bottle of acrylic paint is usually <$1. Put a piece of cardboard in between the front and back of your t-shirt in order to avoid the paint soaking through. When the paint is dry, you can launder the shirt and it won’t come off.
Another option is iron-on letters, but I once used them for team shirts and did not like them. They peeled off on the edges after being washed a couple of times.
Iron-on paper and your color printer.
I like your ideas.