iseeu1001 :
You do know you don't get firmware to downgrade from websites/apple right?
I do not currently own any Apple devices, I quite honestly thing they're not worth the value of the components if sold for scrap once smashed into bits.
However, I I do have experience with the devices - and I know for a fact it's possible to downgrade from iOS 7.
As far as the individual update file itself is concerned, yes, you can find these online. Whether it's through Apple or not, it's possible to acquire them. A simple Google search yields plenty of results. In fact,
this site seems to have quite the selection to choose from.