Can't find a storage box

[blksmith19]

Hello everyone,

I hope someone can direct me to a place that sells aluminum storage boxes for a Jon boat, the type that sit length wise on one side or the other and rests on two seats with a hinged lid. They are usually 4' or 5' long.
Used to see them in almost all alum. Jon boats, especially flat bottoms.
I hope I described it well enough.

I have searched all over the net with no luck so if someone knows where I could find them I would be most appreciative.

Thanks,
Jeff