What other model years front bucket seat can replace my 1993 Honda Civic...
 

...Si's driver's seat? The piece of metal holding my driver's seat to the piece bolted to the floor of my car broke and cannot be fixed. Seems easiest to replace the whole seat and I can probably find one at a junkyard. But I need to know which years can be used to replace it. And will other models' seats work? The Si is the "3 door".

Any 92-95 Civic seat will fit into your car.Del sol seats are a nice upgrade, but the seat height is lower. A Del sol seat swap is good if the driver is a bit tall or long legged for the stock Civic seats. Any Del sol seat will fit. I have Acura Integra seats in my Si right now. Any 94+ year Integra seat will bolt right in.