Passenger window seal
 

I have an '04 RX8, I need to replace the passenger side outside window seal. Does anybody know where the best place to purchase a replacement part other than the dealership. Also does anyone have a part number.

You might want to check with glass specialists. When I got a chip in my windshield, I went to Alamo Auto Glass and they fixed it almost good as new. I'm not 100% sure if then can help with seals, but I imagine they would since they do full window replacements.

I would only use OEM parts, but try one of the dealership sponsors of this site.

I've restored a couple of old vehicles and the only rubber that fits right and lasts long is either the OEM or Steele, and Steele doesn't do newer stuff.