We work with ACP, and sell some of their products.
Several years ago they approached us for suggestions and samples of 'stuff they may be able to make'.
The boss and I came up with a few items.
They came up with a pretty good plastic version of the 1967-8 and 1969-70, heater/A/C boxes. Prototypes were sent to us for fitment and approval. Original heater cores and evaporators fit inside the repro cases.
One of the recent items that came to market are the 1967-68 Mustang and Cougar door window stops, all of them.
Color is off, but they pretty much made exact copies.
There is another A/C component coming soon, I just got the prototype tested.