WELCOME!
Regarding the mirrors...your motors are more than likely seized up. Check this thread out:
http://www.elcovaforums.com/forums/s...ght=mirror+fix. You've got to drill down a bit, but EasyEd posted pics to his fix and I posted a one page printable summary of his steps in the thread as well, also found here:
ftp://www.guruerror.com/easy_eds_mir...et_edition.pdf
Check this site out for some of your other stuff:
http://parts.nalleygmc.com
It looks like your windshield trim (aka MOLDING, Windshield Garnish & Reveal) will set you back about $42.63. Part number: 15857806
http://parts.nalleygmc.com/showAssem...emb ly=392599
EDIT: ...and NICE Mustang!