Yeah, that's a tough one. If you are set on that placement and component setup, one idea might be to mount a bar/piece of wood to the back of your stand. This would allow you to use a wall mount to "float" your TV over the stand. That might get you up high enough to put the receiver under. Another idea might be to fill the space behind the stand with another piece of wood and put the receiver behind it.
If you might be open to replacing your receiver, you could look at a slim-line receiver from Marantz like the NR1402. They should be small enough to fit in the slot under the TV.
Keep us updated and let us know what you end up with.
Is it solipsistic in here, or is it just me?