Update;
Bought two 3" convex mirrors off eBay, total price WITH shipping
$7.52. 
Total cost of project (with mirror cover plates) I plan to keep under $20.
I will install them in my car first without taking the outside mirrors off to see how the visibility is and get used to it and then BYE BYE mirrors, I will let yall know.
Anyone with MPG gain predictions?
