Here is one that can be ordered from Digikey, thereby avoiding Ohmite's minimum order. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail? name=RX-1M1009G-ND 100,000 Megohms! Pull up the datasheet from the link for more info on these extremely high value resistors. 73, Joe, N6DGY Pleasant Grove, UT