Clip on sunglasses with prescription eyeglasses

I have this eyeglasses I bought when I was back in Italy, brand is Polaroid, and they have snap on sunglasses. Extremely useful I bring them everywhere. There were several brands in Italy doing this, including ray ban and other poplar brands I’m trying to get something similar in the US, but I can’t find anything good at major retail stores. Any idea where I can find them? Possibly somewhere they accept insurance?