It always helps to verify what's there so something appropriate/compatible could be recommended. Could you take some and upload to the imgur.com site(?) Then you would post the links to those photos here so we can take a peek.
That said, you should be able to find some distribution systems @ Crutchfield, or at least with photos, determine what you need from some other source online/locally. Examples:
This one handles ten pairs of speakers-
Wall plate for multiple speaker pairs-
I have had luck in the past when I've needed a specific part and wanted quick advice. You can call Crutchfield directly for this sometimes.
I also like the assistance of the expert audiophiles @ AVS forum-
Hope that helps,
Bought a house that has a whole house speaker system, don't know anything else about this setup, except that all the cables are all together in a closet ~ There are 16 speakers throughout the house, most are on the ceiling. The livingroom has 4 in the ceiling, the kitchen also has 4, there is a wall control for these. Upstairs there are 2 in the bathroom with a separate control on the wall. The bedroom also has 2 speakers and a separate wall control. There is a closet on the main floor that ALL the wires are in. I am new to this kind of set up. I almost forgot..there are 2 speakers on the porch with a separate control pad. 2 more on the deck with a single knob control on the side of the house. 16 speakers in total throughout the house. What is the best way to connect 4 separate control pads all going through one source??? Again, I am new to this kind of installation, but am a quick learner! Any advice is greatly appreciated!