After searching for another day and calling several companies including Bestop, I realized what I want is the Flexatrunk, which I also realized only comes for the 07+ Jeeps. And while the Tuffy secure trunk is also very nice, especially with the lifting top, it requires the rear seat to be removed (TJ) or pulled forward (LJ) permanently.
Basically, it seems there aren't enough LJs out there to warrant an LJ specific secure storage solution that takes up all the cargo room without affecting the rear seat.
my996duc1 that looks pretty nice. It seems you went what now looks to be the best route, to have a custom solution made. I've seen some cabinets and drawers for LJs coming in at $700+ online, which is insanely high. I will take inspiration from you, do some measuring and sketching and see if I can't find a local metal shop that will make it for me without breaking the bank. Unfortunately everything up here in Canada seems to cost more than down there in the US
Appreciate everyone's inputs, comments and especially pictures. Thank you.