ITrip compatibility with fifth gen iPod..?

Have the early (2005) fifth gen iPod (model A1136). Purchased an iTrip that works beautifully with my 32Gb 3GS phone, but not the iPod. The iPod works with many of the same docking stations that take the phone so is there an iTrip-esque product out there for both devices to play in the car? The iTrip listed fourth and fifth gen iTouchs as well as the fourth gen Nano and iPod Classic -is there another model/gen to look for in place of mine bc I can’t find it on any packaging. Thank you for the suggestions.