Where can I buy replacement parts for TI-84?
How can I purchase motherboards and screens for TI 84?
Seconded... Though I'm afraid that the answer will be that you have to buy a parts calculator. I contacted TI about this some time ago (specifically looking to buy replacement keys), and they said all that they could do for me was to send the calculator in and that they would send me back a refurbished one. As I recall, the cost of this was at least half of retail ($75 sticks out in my mind).
i gs the texas instrument orders there parts in china.