We now have a expedition shirt and logo thanks to an artist from New Zealand, Thijs de Koning http://yelz-pirates.tumblr.com.
The shirt is $50 and the current sizes are Medium and Large in White Long Sleeve and Gray Short Sleeve. There are Logos on both the front and back of both shirts. Please note that these are Japanese sizes so I would recommend sizing up if you are outside Japan, unless you want to look like the Hulk. If you are in the United States please add $5 for shipping. All proceeds will go toward paying for the trip expenses. Also, the best way to pay would be via Pay-Pal: