We have a High's ice cream store in my town! All the ice cream is sold pre-packaged, though, not by the cone/scoop.
I love p'nut butter-chocolate ice cream, and have "made" some at home by melting the pb in the microwave for a few seconds and pouring it on. Vanilla ice cream also works for this. You can probably even do it with strawberry - it would be like a pb&j, no?