I replied to your email last night. Just for the record, the DIY kit uses MAC97 triac. It’s a pretty common component (unfortunately you can’t find these in Radio Shack — as a side story, last time I walked into Radio Shack and wanted to buy some MOSFET, which I know they have in stock, the guy working there asked me: what’s a MOSFET?) Anyways, you can get these from Mouser.com or Digikey.com.