Isn't it pretty easy to have your own t-shirt printed? We have great Ned pictures, so here in Holland you can have them printed at a very reasonable price.
You can print your shirt at home, even, Blue Jay. Here they sell ink jet transfer paper. Pick your image, flip it on a photo editor, print it on the special paper, iron it onto t-shirt. Instant Ned! (they even have a choice of paper for dark and light shirts.)
There is also printable cotton that you print directly onto and use for your item, or cotton transfer sheets which are smaller and probably wouldn't work as well. I've personally used a transfer medium that allowed me to use a regular sheet of printer paper (but that might have required a photocopy now that I think about it). If one wants to churn out the silk screen, that's a different matter. There are Yudu machines available at most craft stores...
Oh wait... this isn't the 'crafting corner' is it...