I'm the one who thought I found the 'pot of gold' when I found 78/79 Aspen grilles.
Eric bought a tester, and it's wasn't good.
But if you can fix the Mexican grille and have a grille or hope for one that won't break the wallet.
Probably how I found out about it on a different site, in a round-a-bout sort of way. "A guy on one site knows a guy on another site that knows a guy on still yet a different site,,,,,,,,,,,,,,,,,,,,,,GRAPEVINE, that's the word I was searching for. I won't mention the site or any names but Eric probably could figure out which one it was.
Actually those louvers look "off" to me. They don't fit the lower edge of the window arc very well. Or, is that the way the originals fit also?