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I bought the metal frame at Hobby Lobby (the kind that sides comes in different lengths so you can make whatever size you need). They cut the glass & another backer board. I was out of there quick and inexpensive in a matter of minutes.
I took the picture by my back steps and input the text using Photoscape, a great FREE image editing program. Get the Faststone add-on program to add text, batch, watermark etc.
There will definitely be more large prints in my future.