This was a problem for me as well, i looked for a couple weeks before finding a cheaper one than anticipating. I had a budget of up to about 800 or so and only spent 400. It has a floating mount so i was able to raise it above the center and the shelves had enough clearance for air to move around the receiver. if your curious it was from 399sofastore.com and don't knock the name cause they were the only ones in Nashville who had what i needed.
edit for link
http://www.399sofastore.com/haviencrbysa.html