Hidden sound system solution for bucket seats?

[davepl]

Now I'm wishing I'd relocated the fuel tank for this reason, but is there a half-way-decent speaker/sub combo that fits under BUCKET seats? I see stuff in the catalogs for bench seat subs, that sort of thing, but nothing for buckets.

I would need something hidden. If anything I'd put the sub/bass under the seats and then the high range in the stock dash locations, driven with a modern retro-looking (NOT CustomAutosound) radio. So not all Class A components, not looking for audiophile stuff, just "a lot better than the stock dash speaker" level of quality.

Suggestions? Or old threads? Hard to sort out the non-bench from the bench ones, and without photos a lot of people put speakers in plain view, which I want to avoid for this truck.