If any of you Sundancer owners need the weatherstrip that goes along the front and back of the targa gap (seals the front and back of the lift-off top section), it has been reproduced by a Celica Sunchaser fan. Check this Ebay auction:
http://www.ebay.com/itm/1981-82-AMC-Concord-Eagle-Sundancer-TARGA-top-weatherstrip-seal-NEW-Reprod-/152266337932?fits=Make%3AAMC&hash=item2373c7ee8c:g:0jsAAOSwzaJX86Mp&vxp=mtr
I bought some, and its dead-nuts correct.
I love dead nuts accurate lmfao good find I'm sure the sundancer crew will be excited.