So work out the costs involved, paste up your idea on above funding site and let us all know that you've done it. Then push the link around via facebook, twitter etc... let sites like geek.com know etc...etc... In fact, just shut about it the best you can and make it happen.
I'm sure many at Amiga.org would help get it going. Sounds like the sort of calender I would buy.

And good luck, hope you do it.