I changed out the tweeters on my e36 convertible and wanted to reuse the original covers.
The mount i made fits right into the original covers and can be secured with a bit of hot glue.
These mounts fit for the Hertz K130 tweeters and could be remixed to fit other tweeters.

i originally wanted to print them out of ASA, but i couldnt get rid of the warping, so i used TPU. i will test how they hold up in the summer heat.