iPod adapter from apple for 4th gen IPOD

[Dubya]

You mentioned a "3 pk". Are you talking about the universal dock adapters (usually white) that are the plastic forms to adapt for various shaped iPods?

There were some changes in the pin-outs on the iPod electronic plugs that caused earlier generations of iPods not to be able to charge with newer accessories.

BTW - The 2nd and 3rd generation iPod Touch are identical...

Good Luck