Focal do some tweeters part number TWFA0083 I bought them as part of a kit called
IFR 130-4. They're actually pretty good. The kit was easy to install and comes with replacement plastic tweeter supports that insert into the dashboard grilles. The kit also includes separate cross over wiring that you'll probably need.
I have no experience of fitting them to Clios where the tweeters are factory wired. In my car I needed to run the tweeter wires separately and back to the headunit and like I say, came with a pre-wired crossover integrated to the loom.