Digi-Key Corporation
  701 Brooks Ave. South
  PO Box 677
  Thief River Falls  MN  56701-0677
  (800) 344-4539
  (218) 681-3380

  Huge assortment of electronic components, including chips, heat sinks,
  cables, connectors, fans, and every other electronic part you can think of
  except DB23s. Prices tend to be a little higher, which is offset somewhat
  by the fact that they have such a large selection. Their catalog can be
  considered a reference work. Oriented towards electronics designers and
  experimenters.