Gary, cruisergeo
The Paint pen you mentioned is by AutoVisual, here's the web address:
http://www.autovisuals.com/
The paint code for Inferno Red is 'WEL'. The paint code for Clear coat in the pen is 'CLEAR'. I have these and they are OK but not great, best used on very small nicks. These pens are $17.00 each plus shipping (overpriced in my opinion).
You can also get Inferno Red touch up paint from your dealer, small bottle of Inferno Red that is applied with a small brush built into the cap is part # 05013697AA, this actually works pretty good for small chips. I have used this with the Langka paint chip kit and gotten fair results.
Inferno Red touch-up in a spray can from the dealer is #05013698AA, Clear coat in the spray can is part # 04443632.