Replacing bench seats with toolboxes

[psmays]

I’m going to replace the bench seats in the tub of my 88” Series III. Just don’t like the look of the things and — more to the point — I can imagine no situation in which someone will be riding around the back. I’d like to replace them with some sort of simple storage/tool box. Probably one one either side of the tub. Nothing fancy, just a simple box I can padlock. Obviously I’ll want them bolted to the tub but the need to be able to remove easily.


Seems like there would be no shortage of these. Can anyone point me in the right direction?