All in one bag.
 

Hello, I was just wondering if there was an all in one bag or anything along the lines, I was never able to find one when I browsed the bag/bank section.

You can pretty much achieve this by using the right mod and setting it up accordingly. One such mod would be: Link

Set to Frame Only so that there is no Drag / Title box or Close X and the bags will become completely title-less with just the slots showing. Then simply align them up against each other and use the Open All Bags keybind. When open, all the bags will look as if they are one single bag.