http://www.felixbruns.de/iPod/firmware/
after that change the file name to change it from zip to ipsw see this video to know how to change it http://www.youtube.com/watch?v=fSEQCNdsNNU
after that download itunes old virgon which is 9.2 use this web to download
http://www.oldapps.com/itunes.php?old_itunes=59
finaly connect ur ipad to itunes see this video to downgreat ur ipad
http://www.youtube.com/watch?v=F2VWzLOQ51s