[Gil Gordon]

I was under the impression that any modded stock ROM must be signed.
Usually, if you know your CPU, board ID, manufacturer and date of Installed ROM, you can just Google for it. The problem is that there are so many variations and ROMs being re written weekly / daily.
I know:
CPU
Board ID
Date of original ROM.
But not the manufacturer.
I have been searching for weeks and found a Rom on Baidu, which is close, but still a couple of glitches. But unpacking the "current" ROM it would appear that it is a modded Galaxy S4. So I tried the stock S4 but nowhere near.
Now my train of thought is that the reason for "Signing" a mod was to pay respect to the original author?
So, to return to the original question. Is there a database of ROMs somewhere that has avast number of Stock and signed Mods?