What model Acura do you have?, I have an RSX and I just ordered a xenarc to replace my HU. I measured it and I know it will fit for me, and I think I can get a slotless dvd drive vertical on the side if I fab it.

their are two people I have seen put a monitor in an rsx this way lopan(lilliput i believe) on this forum and ctd something(xenarc) on clubrsx.com
EDIT: i didnt see that you are keeping a HU underneath it. in this case you could get a din sized motorized lcd from circuit city or some local audio shop. If you want touchscreen I saw some solution for the same 1 din unit and someone put a xenarc inside it(non motorized)