Well you know what Fuzzy wants. If it was me, I'd secretly code something up over the coming months, and deliver it anyway..
(Especially as piston gets better, and so does steemd)
If I was this knee deep, and it bugged me. I'd just do it. If he didn't want to take it after it ran... well.. I still gave him a workable product in the end. That's the only thing that would make me feel better.
Each and everyday people are doing amazing things... just look at esteem. The guy is doing all of that... unpaid... luckily he can do it without money.
You'll find yourself with spare time here and there. Make it a mission. Fuzzy will say don't bother. But if you showed him a sexy website that actually works, with the specs that he wanted..
Time could create some healing and this will end nicely.