Victory over Munster Rugby in that epic semi-final in Montpelier earned Clermont their ticket to Dublin and having beaten Leinster Rugby twice in the Pool stages they have ended all Irish dreams of making it six titles in nine years.
But given the nature of the friendly rivalry, and respect, built up over their games against Leinster in recent seasons, allied to the fact Joe Schmidt used to be their coach, James is hoping the locals will be backing yellow rather than the red of Toulon.
"We kind of hoped that some of those Irish supporters would get behind us if we got back to the Aviva. It would be nice to see them out there," James told the Sunday Independent's Brendan Fanning.
"We've had some interesting trips to Dublin over the last few seasons and I'm sure that's going to continue this weekend."
Since joining Clermont seven years ago James has transformed himself from bit part player at the Western Force to the driving influence at one of Europe's most successful sides. It is not just his goalkicking that has steered Clermont into six major finals during his stint at the club.
His general game management since taking over the No 10 jersey from Wales and British & Irish Lions legend Stephen Jones has marked him out as one of Clermont's most consistent performers, despite the presence of David Skrela in recent seasons.
He ended his first season at the club with an Amlin Challenge Cup winners' medal, scoring a try, two conversions and a penalty in the 22-16 victory over Bath Rugby in the final at Twickenham Stoop, and then played in four successive French Championship finals.
His five penalties weren't enough to make it a double in 2007, as Clermont went down 23-18 to Stade Francais Paris, and his 10 the following year against Toulouse were too few again. In 2009, he partnered current Toulon backs coach Pierre Mignoni at half-back and scored eight points in a 22-13 defeat to Perpignan.
Success finally came, both for James and, at the 10th time of asking, Clermont in the 2010 final in Paris when the Bouclier de Bennus finally found its way back to Stade Michel Michelin.
This season's quest has all been about climbing Europe's Everest by winning the Heineken Cup, but there is also a chance of a double if Clermont can keep on winning. They ended the Top 14 season at No 1 and will play in the semi-finals next weekend.
"The Heineken Cup is not an easy competition to win and to try to manage it with your home competition as well is a very hard thing to do. I guess we struggled a bit with that for the first couple of years since we got back into it regularly," admitted James.
"We might have had a bit more of a focus on Top 14 and maybe we gained some experience through that. Being our first Heineken Cup final has its own importance, but for us the European stage is still quite a big step.
"It's one of those competitions where you have to earn your stripes and learn how to go about things. I'm not the one to judge if this is the biggest game in the club's history, but over the last few years it has to be up there."