Radio Shack already has this. *Tandy FAXBack. *I used it
  extensively when I worked there. *Tandy has available, through
  Faxback, information on EVERY computer Radio Shack ever sold, as
  well as information on the correct perhipherals to use with
  them, how to get them (even third-part items are listed) and how
  much they cost. The database is updated very frequently. Ken
  [email protected], former employee of Radio Shack 01-2292