Attached is the STL file for the Polk Audio DB5252 DB+ Series Component Speaker System tweeter. It is printed out of ASA and attached to the dash via 3M double-sided tape. The 3M tape seems to be holding well through hot and cold. Use a grommet in the speaker wire hole. I don't remember the size, but it is in the kit that can be purchased from Harbor Freight. Also, you will likely need to cut down the center bolt that is used to fasten in the tweeter holder provided in the speaker kit.