I know this thread is a month or so old but I just had a sub enclosure put in my trunk - no more spare! I expect a flat tire any minute now...
Thought I would share pics for any future people interested:
101_6208 by
dotcomee, on Flickr
101_6211 by
dotcomee, on Flickr
IMG_20140318_133057_resize by
dotcomee, on Flickr
Pro Car Audio in Austin did the work, and did an amazing job, it sounds and looks awesome!