Classic Auto Air adapter mounting plate for factory A/C cars

I want to make sure I can find this thread when needed. I sure would like to see a detailed installment step by step. I think if someone would like a CAD drawing there is value for your hard work. Not a killing but a contribution to your car hobby. A $100 for the adapter and instructions would be money well spent!!!! It would be much less than having a plate cut. Thanks for your efforts.