Xantech has a 6-output block with only one drawback: all inputs and outputs are mini-plugs. It has no screw terminals. Amplified blocks are also available. I have used the ten-output block with zero problems.

Oh, yeah, and there is another way to create more outputs. Each output of a block is simply the input going through a 470 ohm or 100 ohm resistor to an LED. Each LED has its own resistor in series with it, like so:

Sensor Positive out -----------resistor-------------LED positive
Sensor Negative-------------------------------------LED negative

The 100 ohm resistor is rarely used as enough IR comes out of the LED when a 470 ohm resistor is used. Also, one LED with a 100 ohm resistor takes as much current as five LEDs set up with 470 ohm resistors, so I wonder why I even mentioned it...I know: so you will know that some circuits provide a lot of current, but the 470 ohm approach is the better one.

Anyway, when I used the amplified ten-output block, I ended up needing thirteen outputs, and I created three more by using three 470 ohm resistors and three more LEDs.

If you have any question about how to wire this, email me and I will create a better pseudo-drawing for you.