how to mount brat bed seats?

[baccaruda]

Hi, first i'd like to brag that I got a set of brat bed seats! very slight cracking which will fill in nicely with some black epoxy, and then I'll probably coat them with POR-15 if I find that the stuff works OK on plastic.

 

I'm interested in any and all trick ways to mount these in your brat bed.

 

I'm trying to dream up either some sort of lockable clamp type system so I don't have to unscrew anything to get them out fast, or maybe ditching the stock frame and getting a metal "car-stuff box" made that they could sit on, with the hinge toward the rear, and then a clevis pin setup or something under the lid?