Where to buy Slip Stream 120 Slim PWM fan ?

[tOo.]

Hello, I'm planning to buy two Setsugen 2 for both of my two Radeon 5850, but even if the Setsugen 2 seems to be an ideal choice to me (slim enough to fit between the 2 card and still really performant) I'm afraid the regular DC fan mounted on won't be regulated automatically by the card itself.

Anyway, there is a plan B, find some Slip Stream 120 Slim PWM fan (120mm slim fan powered by PWM) an put it on the VGA cooler but... where can I find some ? The only way I found until now is to buy a Big Shuriken 2 and swap the fans (really too expensive for just a fan), is there any way to buy some from Scythe itself or do anybody know a reseller who could ?

Note that I already found an adaptator to wire any regular PWM fan to the video card, so a standart Slip Stream 120 Slim PWM fan will fit

Thank you