Horn speaker buiid

I have been considering building my own horn speakers. I’ve looked at companies like Oswald Mill Audio and really like the ones they build. But I’m unable to afford them.

I don’t know if this will happen or not, just investigating the possibility. Can anyone recommend a site to get information and maybe plans or kits.

Thanks
Mike

Madisound

Madisound Speaker Components (madisoundspeakerstore.com)

4pi sells horn kits.

4pi?