Where can I find the official V50020B firmware?

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Looking for official V50020B firmware

I have been looking for the official LG firmware V50020B NEU (Northern Europe) to download, but i have not been able to find it.
The official LG links found on the following sites, to all but the latest 20D KitKat version, are now dead. lg-phone-firmware.com/index.php?id_mod=39 and lg-phones.org/official-stock-lg-g-pad-8-3-v500-rom-firmware.html
I am looking for the 20B version because i'm dissatisfied with the home interface lag in the 20D version, and therefore i would like to try the previous one to see if it is any better.
Can someone please provide me with the said firmware version?

 

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Is there no one that have hold of any of the previous firmwares or that can provide a link to where they are storaged? Have the official V50020A and 20B firmwares simply been deleted or vanished from existence?