Double: http://curiousinventor.com/store/product/292
Quad: http://curiousinventor.com/store/product/293
Shield: http://curiousinventor.com/store/product/290
Scott has been hard at work designing and making a simple system to connect multiple stribe kits together. The system includes a purpose-built shield that integrates a multiplexing circuit to use 12 sensors with the Arduino's 6 ADCs.