firewall heater block off plate?
 

hey guys, i recently took the heater box off of my 1969 cutlass (should be the same as a chevelle) and want to put on a delete plate, i've been looking all over and the only ones i can find are either 1- for g-body cars, or 2- are an absolute ridiculous price for sheetmetal

i just want it to look professional rather than have myself just make something
any help would be GREATLY appreciated i can't find anything anywhere