Looking for original radio mounting brackets to install Blaupunkt Frankfurt. Thanks to @IAA1963 I think I have photos of the necessary parts.
Click to view attachment
Click to view attachment
Click to view attachment

C clip is hard to find. Konigs Klassic Radios will sell you new mounting brackets from the 911 kit as shown. Brackets are about($25 parts, $25 shipping) $50 shipped, click to open.

I have the side clips available

https://www.early911sregistry.org/forums/sh...Blaupunkt-Radio

I have the C clip but need to find it in storage. From memory, the back of mine is slightly different with an additional hole for a stud on the firewall. It has been a few years. Mine had been installed in a 1974 914.