Broker1 KCS BV: Obsolete and hard to find electronic components. Semiconductors and chips and a good search engine.
Circuit Solutions Inc: A distributor of new and obsolete electronic components.
Cross Components, inc.: Supplier of obsolete, hard to find and long lead time items. On line search engine.
Dmac International: Surplus and obsolete electronics components.
Electronic Material Industries, Inc.: A buyer and seller of Mil Spec components, resistors, ic's, capacitors and other electronic material.
Electronic Obsolete: Supplier of old, obsolete and discontinued electronic components from the 1950's onward. Great search engine, you have to know the part number.
Electronics Surplus Instruments and R and D Electronics: These guys can supply old out of date IC's and discretes.
Rochester Electronics Inc: A source of obsolescent semiconductors, leaders on the trailing edge of technology.