I found an '81 SX4 with some good parts. It has a 2" receiver type hitch:
Rear 3 piece spoiler (wing):
The center part needs a little repair, but nothing major. It also has a hole to insert the key through.
I also found the rear side marker lights that are a little faded, but still intact.
I will go back and pull the parts for you for $40 labor for each part (marker lights $5) + the cost of the parts and shipping. I think the hitch will sell for around $50, and the spoiler for about the same.
P.M. me if you would like the parts. Thanks, Rich