WTB - unusual under dash AC vents/bezels

[moparrob]

Trying to locate the vent bezels for this unusual under dash AC system from a 1976 911S. It is a dealer installed unit from So. Cal. but I do not know the brand.

The most unusual feature is that it has four vents, rather than six.







I have four of the inner vent portion, but three of the bezels have cracked. These are also unusual in that they are square, and not rounded bezels. The openings appear to be 1" x 5.5".











I am also looking to replace this knob





Any leads would be greatly appreciated. Thanks.