Thanks Hitman but that's the only adress I already knew off but I think it's rather expensive (€ 40,- or $ 52,- (!). And ofcourse it'll cost me an extra € 8,- for the shipment)
I think that's a bit ridiculous because NaturalPoint offers exactly the same product for $ 20,- Now
that's a nice price for an add-on.
I'm afraid i'll have to wait until a next version comes out (instead of an add-on) or maybe I'll get impulsive and order the bloody thing anyway