Sorry, I don't have any of that trim. It's a tough one to find in good shape cause they were made of aluminum and only one year. 64-65 Were made of stainless which held up better, but unfortunately is narrower and doesn't line up with the tail lights when used on a 66.
I have seen some on eBay before, but keep in mind any you find will probably need to be restored. Might be easier to have yours restored if you already have a pair, I have seen some nasty trim with dents restored to show condition before , aluminum is easy to work with too so yours might be a good candidate.
My dad has a 66 Cuda and might have an extra pair, I'll check with him.