Welcome to AF !
Actualy all these models have the triangle piece where the tweeters are whether you have tweeters or not.
Here is a link with the meat and potatoes. lol
http://www.a1electric.com/grandam.htm
Also if your window wasnt going all the way up or down then its your regulator which has a cable that lifts/lowers the window.
If you look down into the door thru the top you'll probly see where the cable goes into the housing, and its frayed and wont go thru the guides.
The glass is held to the regulator lift by two plastic clips, these also tend to break off.
You can buy these new at a stealership. They must be epoxied on and allowed to dry for 24 hrs or it wont work/hold.
Hope that helps!