Chris says----------

scott have you tried jc whittney, i almost did this for my ice box when it 
got cracked. they used to have them. Though i ended up finding mine at a junk 
yard

Thanks Chris -

That's where I got the measurements from - the frame on my ice box measures 
17"w x 21.25"h and the one in JC Whitney says it requires a cut out 17.75"w x 
20"h (the frame is 19"w x 21.25")