Largest cargo bay in a mod?

[Aeroboi]

I want to know the mod with the largest cargo bay that looks stock a like or is otherwise white colored or looks okay-ish in that respect from your view. Preferably one that has a very wide cargo hold above 5m that I can stack...

[kerbiloid]

Maybe this (currently outdated) one still can help. Gray but large.

 

 

Also big planes

and

https://spacedock.info/mod/711/Orbit+Portal+Technology+[OPT]+Spaceplane+Parts

 

 

Edited April 1, 2019 by kerbiloid

[Friznit]

Also check out MRS.  It has stockalike inline cargo bays up to 2.5m by default but they can be tweakscaled to 5m+