So I tried a search for the term "Gun Safe" and this search engine ignores "Gun" and I get 16000 hits on "safe"... not very smart or useful.

What I have is a gun safe with the typical barrel notches in a horseshoe shape left right and back for long gun storage.

I have all notches filled and then some.
AR15's are safe hogs because of the pistol grip and carry handle and my A2 was always tipping out.
I added bunji cords to keep the barrels in the notches.
I also got a browning velcro kit that lets you hang small, light, thin items on the back of the upholstered door without drilling holes

Now what I am wanting to do is place some upholstered spacers across the middle to allow maybe one 2 or 3 additional rifles to be stored muzzle down. I thought of a simple fixed dowel pin vertically on each side with the spacer having holes that simply slip over the dowel. Easy on/off and easy access to the rear of the safe.

Anybody have any useful modifications for the inside of their safe?
Or any websites that sell safe accessories?