AC vents for 66/67 Malibu Wagon

My dash AC vents all need to be replaced in my 66 Malibu Wagon. I have been able to locate replacement parts for the 2 round lower side vents but have not found anything for the upper rectangular center vent. The center opening measures 7 1/2"w x 1 1/2"h.
Any suggestions or ideas if another year vent might fit?

 

Just for reference......do your vents look like these? (Right of pic, near top)

 

I think that might be an aftermarket system. I couldn't find any good pictures of an original A/C dash. Isn't the center vent just one long piece?

 

My original upper vent was all busted up. What was left shows it was one single assembly that fit the opening.

 

I'd do some junk yard searching......

 

Try to get one from a 67 its metal and not plastic like the 66 hence it will hold up better.

D&O