I've not seen or heard of a 74" chipmunk with a foam wing. That's not to say one doesn't exist. Most I have seen (either ARF or kit built) are around 57 to 64" w/s. Wonder if your friend had a Dynaflite Chipmunk that was modified?

Jamara's and Flair's Chipmunks look to be the same as the one KMP sells. IIRC there's one vendor in China that sells these to several different distributors. Not sure who makes WM's Chipmunk but I'll wager it's an Asian country of origin.

I've had the Goldberg Chipmunk and it is a sweet flyer. You can do just about anything you want with it. If you like building kits this is the one to get.

Jeff