I don't know about all of the members of the Mac, but I think Viggo Mortensen from "The Lord of the Rings" movies would make a great Lindsey! I think he plays in a band too, if I'm not mistaken.
Go to this website for a picture of Viggo.
I've been watching the "Wings" re-runs on Nick@Nite and I think Crystal Bernard would make a great Stevie.
Susie