Takuya Katayama was selling 1k tempco's (3300ppm) on this very list at something like $0.40 each. He probably still has some, as he had thousands of them. > just happened to notice, Adafruit (they of x0xb0x fame) have 1k tempcos for $1.75@ (2 piece min. order): > > http://www.adafruit.com/index.php?main_page=product_info&products_id=42