The sticker on the underside of mine has a logo with the letters "MIC" in it, FCC ID AQ6-7D0080COB, keyboard model RT7D00, and a list that says:
1. RT7D00
2. E-C012-00-3231
3. Minebea Thai Ltd / Thailand
4. 2001
5. Minebea Thai Ltd / Thailand.
Two other random numbers on the sticker are 3892C595 and E-97600
Hope that helps, but I'm sure you could order it straigh from Dell...