[shorod]

The Aura is based off an Opel, so I'm not sure you'll find another US-based GM with seats that would just bolt in. You might be able to find a universal bracket for use with aftermarket performance seats, but I'm not sure those would be to your liking either.

Another option might be to find an automotive upholsterer in your area and ask them about rebuilding your seats with a firmer foam pad.

So your stock seats have airbags in them? If so, swapping out the seats is probably not an option without disabling the SRS system.

-Rod