Enjoyable post, @RealityCheck18 
I'm afraid giant horn loaded subwoofers aren't in great demand. People want ever smaller subs these days, so more and more subs are sealed. Adding two drivers dual opposed in the same cabinet, will give you more oomph while still having a reasonably small box if you compensate for the lack of volume with lots of watts.
I'm afraid giant horn loaded subwoofers aren't in great demand. People want ever smaller subs these days, so more and more subs are sealed. Adding two drivers dual opposed in the same cabinet, will give you more oomph while still having a reasonably small box if you compensate for the lack of volume with lots of watts.