Carlos, I agree with Dennis, the one you have pictured there looks very nice. Regarding only being available on the SS. That is not correct, that was the standard wheel cover on the 70-72 Monte, all others were optional with the exception, I think, with the 72 Custom which I think came standard with the "Turbo" caps.
I know I have some of the ones you have pictured but I am not sure what condition they are in. I will look and see what I have. I know I have a full set that I want to keep but may have some others. If I do have some others I will make you a deal on them.
Here is the deal, if you will become a full fledged dues paying member of the club I will give them to you free of charge with the exception of the shipping costs. Give me some time to get back up to my storage garage where my car is and I will check to see what condition they are in.
rob