I just had an aerosol can mixed up at a local motor factors, the paint code (727 from memory) is on the sticker in the door shut where the VIN is. Although not the cheapest option at £13ish, I prefer it than a touch up stick as you can spray the paint into the lid and it is much thinner and easier to apply. I have plenty of paint, so I may start painting random things Trophy red!
Renault to their own touch up pen. Probably get someone reputable to get some mixed up. Only thing to note is that many Trophy's will have faded paint in places. Obviously new paint wont match those areas.