when you say bracket, do you mean the cage? if so, ive never seen a place that sold them, but you might check ebay.

why dont you try making the tweeter flush against the door, so the handle doesnt hit it.

try to listen to your system without the 6x9. if the fronts are tuned good enough, i bet you wont even miss the rear fill.

otherwise, just make sure you arent having the 6x9 share the same airspace as the subs.

what kind of hatchback do you have?