Here's some pictures of my Jeep... it's an ARB Bumper and is so beautifully made compared to anything else out there for the Wranglers...
When the FJ45 arrives in Dubai, I'm going to take some measurements... I'll either get another ARB and make some minor modifications to make it work, or fabricate something new taking a lot of inspiration from the ARB.
I'm really hoping the FJ45 tray and the Wrangler tub are close enough in width that this is workable... Alter the corners and the mounting brackets and done.
Some of the key features are the double shear hinge, i.e. there's a top plate and a bottom plate and it's bolted all the way through. This goes a LONG way to eliminate tire shake. This thing is SOLID.
The bottom of the hinge bolt has another bolt pressing into the side of it. This allows you to counter the sag of the swing-arm and make it swing in perfectly without having to lift it to close it.
It has a spring catch that allows you to lock it open when you're parked off camber.
It has a gas strut to make opening it just a little bit easier.
It has a slam shut latch, just like a car door would.
The Latch area has MANY adjustments so you can make it slam shut perfectly. Lots of slotted holes to allow for fine tuning.
The tire mounts is kinda like a trailer hitch in a 2" sleeve - it allows you to set the depth for the tire width / rim backspacing, then drill through and bolt them together to set the depth. Keeping the tire FIRM against the upright supports of the swing arm also help eliminate the shakes.
Massively complicated to build and install, but an absolute joy to use.