I am in need of a similar item, they seem very elusive. I am starting think I will need to modify something else or make it myself from sheet aluminum.
Goodluck
Many 73 and later V8 cars and many slant 6 cars with a/c had 26 inch wide radiators and shrouds. I think those are much easier to find in good used condition.
Good luck
I swapped a 360 into a slant '74 Duster. Simply flipped the slant shroud over top to bottom and trimmed a tiny bit off the bottom lip to clear the lower radiator hose. Fits like a glove.