nother option on multi zone speakers
another option to tide you through would be to consider a speaker selector box.
I got a Niles unit that handles 6 pair of speakers, single input, with on/off and volume control for each pair. (SSVC6) - got it on ebay for less than $200
(make sure you look for the VC.. Niles also makes speaker selector switches without volume controls)
Russ sound makes a unit (PRO-6HP) that handles 2 inputs, with each speaker's source selectable.. runs about $200 on ebay