1.0.3 firmware needed for my ipod shuffle 2G

I have a 1GB pink shuffle(2nd generation)and recently I have upgraded its firmware from 1.0.3 to 1.0.4 from this link www.felixbruns.de/iPod/firmware

After the update I found out the volume of my ipod has decreased (I have tried to set max volume limit in itunes but no use)and I want to restore my ipod with previous firmware 1.0.3 but I am unable to find that file even on internet or through software update in itunes.So I need this firmware file 133/1.0.3.ipsw.