I purchased an Aircom T9 online and it arrived today.
Update:
The Aircom wobbled a little (not sure if it was the Aircom or the top of the Marantz that is not level) so I put 4 layers of tape under the offending foot.
I also read a review that pointed out that the gap between the Aircom and the AV receiver reduces its efficiency and suggested sealing that gap.
I used some foam sealing tape and I can now really feel the air being drawn into the Marantz.
Thanks for the tip.