replacing oem sub in 2008 eclipse spyder

 Well like I said its a 2008 Eclipse Spyder with the oem Rockford system and I am going to change out that 9.75" sub thats in the middle of the back seat. First off, I have looked and searched and have not found another 9.75" sub available.  Soo would I need to go with a 10" and shave the metal brace that it is sitting in? Or is there a sub that would just fit in that slot? Three things to keep in mind, its not a deep area that its going in soo I need to keep sub dept to a minimum, also there is no true enclosure for it soo it will not be in a sealed box per say, and the amp that is to be used with the sub is a Hifoncs Brutus amp I believe thats 2000w rms at 1ohm I think. Any suggestions or ideas would be greatly appreciated

1: You won't find a decent sub in that size, aftermarket. 2: A 10" driver will require some fab. 3: Finding a shallow, good 10" driver will be like finding hen's teeth. 4: Finding a shallow, good, FREE-AIR, 10" driver will be an even MORE rare animal. Looks to me like you are in for some serious fabrication, and frame/chassis mods! An enclosure will be pretty much mandatory. (And the phrase is per se. Just constructive...)It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."