Modern seatbelt retrofit - who makes these?

I believe these have been discussed on the forum but I have been messing around with the search feature and I just can't seem to find the thread.

There are at least a couple of companies that make three point seat belts that can be retrofit into our cars. IIRC, they offer a kit for bucket seat cars and a kit for bench cars. I believe that for those of us with a ceiling mount, it uses that existing point with the retractor on the floor.

Am I imagining this?
Thanks for any hints or points in the right direction.