I decided to go with these relays. They are pretty cheap ($4 each), only use 1/2 watt, and are small. I ordered sockets for them, too, so that the relays can be easily replaced. The sockets have about the same small footprint. I will probably mount them on a couple of perforated prototype boards. Add some terminal blocks for the wiring. Should work and take up the least amount of room.
Ira
Ira