I've tried two local sources both said they could get one, both after a few months effort say they can't
Yep
Not nearly as rare as your piece but, I've been having a troublesome time finding a wind shield for a 77 van.
Been looking for many years.
Some folks have claimed to have 'em but were scared of shipping.
I'm thinking they are not being reproduced for such a small number of units.
I doubt glass sat in warehouses for decades like hard parts.
Hope you can find what you are looking for.
I saw an add for "Stephens Performance", a Sponsor for this site,
in an issue of Mopar Muscle magazine.
http://stephensperformance.com/The claim is "Worlds Largest Mopar salvage operation."
I'm called em .
No help.