I'm afraid I don't know of any fics with OT!Obi-Wan/Han :( Only a couple of brief fics or tidbits where Obi gives him a demonstration of the Force. I do hope you get a fill, however! This could go so many wonderful ways. I did also have a very hard time navigating that website the first time, so I understand where you're coming from.

It's one of those silly t-shirt icons. I cracked up when I saw it x)