It can actually be discussed if this falls under fair use. Normally the non-profit first factor you're bringing to light is applied to methods of education or when encouraging creativity. You've taken exact logos and the exact name of the game, which turns it more into non-profit advertisement.
The second factor in the fair use doctrine is that you're using particular expressions/fixations of the developer's ideas/facts, not simply the facts and ideas that would be separate from copyright.
The fourth factor deals with the effect upon the developer's work. As SG has previously mentioned, this affects Zanz' ability to exploit his own original work through the fact that it may very well be preferred to donations. The reason it has an effect is one that SG also mentioned: the company making the tees get most the profit, so people who buy them give 95% less to EtG than they would if they donated.
You'll likely need to get Zanz' permission for this. If you do, and I like the manufacturer/model, I'll buy one or two.