with only sizes for the larger fanboi available
Far be it from me to suggest that this may be the only size required for this demographic.
Talking of demo graphics, why isn't there a service available yet where you can do your own custom design on a simple Paint style grid and have it auto knitted for you on a machine? This would be easy : after all punched cards were originally developed for the Jacqard loom and subsequently made their way into the computer industry by way of Babbage.
I'd get an Ada Lovelace / Charles Babbage one done and out-geek the lot of you.