Apparently these 15 inch wheelcovers were OEM on 1980 LeSabres and Electras. This would be proper for my car!
I should try to acquire some at a decent price. All day I've been thinking of pizza pans but I just don't like the practical application of them, with choosing between ugly, insecure, difficult.
If I got ones like these, what would I fill the gaps with? It would have to be light, smooth, and secure. Then again, maybe I'd just not fill the gaps...it doesn't look too bad, it's got to be better than my deep dish wheels sans covers.