5220 cassette deck

Hi I just bought a Marantz 5220 and Tadic in Serbia will make a wood case for me. I also have a Marantz 6300 that I plan to place on top of the 5220 when I get the wood case. My problem is which wood case for 5220 will be depth enough to have 6300 on top. Tadic tells me that the right wood case...