Here are the online generators I used, along with some other good ones
http://analemmatic.sourceforge.net/cgi-bin/papercraft.pl
http://analemmatic.sourceforge.net/cgi-bin/sundial.pl
http://www.pandy.me.uk/sundials/wd_calc.htm
Also, you might be interested in
Absolutely-- this was just a draft proof-of-concept. The final version will be permanently mounted, decorated, and (I hope) fully weatherized.