Here Are the links to Mirrors of the official iOS .ipsw firmwares
All Links are hosted via MEGA
iPhone:
iPhone 3GS 2,1: Here
iPhone 4 (GSM) 3,1: Here
iPhone 4 (GSM Rev. A) 3,2: Here
iPhone 4 (CDMA) 3,3: Here
iPhone 4S 4,1: Here
iPhone 5 5,2: Here
iPad:
iPad 2 (wifi) 2,1: Here
iPad 2 (GSM) 2,2: Here
iPad 2 (CDMA) 2,3: Here
iPad 2 (rev. A Wifi) 2,4: Here
iPad mini (wifi)2,5: Here
iPad mini (GSM) 2,6: Here
iPad mini (CDMA) 2,7: Here
iPad 3 (wifi) 3,1: Here
iPad 3 (GSM) 3,2: Here
iPad 3 (CDMA) 3,3:Here
iPad 4 (wifi) 3,4: Here
iPad 4 (GSM) 3,5: Here
iPad 4 (CDMA) 3,6: Here
iPod:
iPod Touch 4G 4,1: Here
iPod Touch 5G 5,1: Here
-Colton