I have been parting out Cougars for 27 years, over 1500 cars and never have I found a pair. Once in awhile a grade B passenger side will come around. Many were replaced more than once under warranty back in the day. Design flaw, the repros will never crack.
Air filter elbow duct.
Rear chrome ashtray top, or whole assembly.
Non XR7 glove box door.
Black dash pad.
And an era correct, aftermarket, tach to clamp on the steering column. An old Sun?
Let me know if you have any of these.