Has any country exported an RTG to be shot into space by someone else?
Vertically-integrating it yourself is one thing, but I'd expect NASA exporting a chunk of plutonium to India, even if they're both are nuclear states, would be challenging.
the US supplies nuclear weapons to partner countries and keeps them in US custody and guard while on foreign soil. I suspect the same kind of agreement would be in place with an RTG until launched.
Vertically-integrating it yourself is one thing, but I'd expect NASA exporting a chunk of plutonium to India, even if they're both are nuclear states, would be challenging.