For my fellow Honda heads.
The trained Honda eye will know: these are the most celebrated seats installed in the least celebrated platform. To make the RSX-S seats fit, the original brackets were cut off and new ones were fabricated and welded directly to the rails. (This happens to be a H-swapped and manual-swapped 1996 Accord wagon.)
Old brackets being cut off.
Building up a front bracket.
Gusset added.
Other front bracket.
Alternate view.
Napkin sketch!