Jim, there is a Thread on here for making fake rocks, you could make it to the size and height you want.
heres the link
http://www.aussiepythons.com/index.p...ic&t=11694
there are some pics of the finished rock,on the 2nd page of that thread.
If you've got some spare time it would be worth making one.
hope that helps man, it would look better then plain old bricks....and hold heat.
cheers
