Switching sliding glass doors to French Doors

[Mark Ferguson]

Good evening,

I have bought a 2 year live in flip and my first project is to replace a sliding glass door that I can't lock from the outside to French doors. I have looked up the how too and it seems straight forward. 

My main question is where can I find deals on securing nice French doors. I dont mind purchasing new, used or maybe refurnishing some as I have plenty of time. Just want a few ideas.

Thank you.