Turns out the car has been at the museum all along, and was briefly on display when I took the pics back around 1986 (I'm rather embarrassed that I didn't contact them in the first place!). The curator says they'll be accepting sealed bids for the car in the next few months, after a second appraisal is concluded, and the one-off is expected to sell somewhere in the six-figures.
It's going to be interesting to see the outcome of the sale, as this is one important Imperial!
Thanks West, for bringing the forgotten LeBaron to light again. (Scroll down to see two original pics here).
Edited by TG57Roadmaster, 28 July 2011 - 05:08 PM.