Jeep tj Wrangler 12" sub box?

Hey everyone i have a 97 jeep wrangler that has had a 10" rockford sub in the rear for less than a year. The sub blew so i purchased an infinity reference 12" sub. I ordered a 12" truck box from ebay but it turns out that the box is too thin for the sub an the sub hits the back of the box. Does anyone have a single 12" sub in the back of their wrangler? What type of box is it, where can i find it on the internet?

Would a Q-logic

Any input would be appreciated Thank you, Derek