Get with the MCA or Mustang Club of America, and find your local club meetings, times, dates, etc. If they do not locally have people that have parts for sale, they will in the state, and usually are on an honor system when you buy between members. Also try Racing Junk.com (I think that is the correct site) as they also have a parts swap and forum based on the honor system. A lot of times you can even arrange barter system trades. At least so I have.
MCA of Chicago: Taking On Tomorrow I believe the official site is. Best of luck. And by the way I am running an 89 LX converted into a beast known as The Nightmare 347 aka Death's Steed. I am also adding all of the Anderson parts to my system. Check my reply on rear end ratios. You will see what I used. Tried to update my profile here, but damn if there aren't website problems for the last two days I have tried lol. Be well.