The only one I know that has anything cooking is SCT Scandinavian Car Tuning.
They say they are working on some parts but you need to log into the member area to get the inside story. http://www.sct-tuning.com/default2/
Yeah, if u go to www.evolvecars.com they have some cool stuff for the S40 T5. The computer chip they have adds 34 Hp. It costs 640 but you'd have 252 Hp. I'm seriously thinking about getting one myself.
Beware: I contact eVolve and they indicate the following: If I add the performance chip to the volvo and I need to provide some kind of maintenance in the Volvo dealer, they erase the chip programming, so I NEED to send back the ECu for reprograming to eVolve everytime the Volvo dealer "touch" the software in the car. Is that true? This can be a nightmare!