Under Seat Storage option

[Big Red]

https://razorbackoffroad.com/product/xd-1500-under-seat-storage-box-2drf-4drr/

I've seen several people rigging up boxes to mount under the front seat. This might work well for some of you that might like a larger more "fixed" solution.

 

[Mr.C]

Another option I found for under seat storage is histandardoutfitters.com They have sealed, locking metal boxes for under the front and rear passenger seats, as well as a front locking one that installs in front of the cup holders in the front. Pretty spendy, but I like the fact that they supposedly seal and lock. The front cup holder one really caught my attention.