As a convenience to those who have purchased the second book, More Electronic Projects for the Evil Genius, we offer the specialized parts for this project if they cannot be found at your local electronics store:

COPCHASLSD4 - Fabricated Copper Chassis
PIN - Photo Diode
PINX - Silicon Photo Diode
RE12115 - Relay 12 Volt Coil 115 Vac Contacts
38100 - 38mm x 100mm fl Lens