Oh yeah, the 2004 was the slight face lift. I know the earlier models you could do an exact swap with the manual and auto climate control and gain the function of the cassette player and then you could get an adapter to plug into a bluetooth player. Not sure about 2004+. But I guess they're still out there on eBay, here's one for $80.
YOU ARE RESPONSIBLE FOR MAKING SURE YOU BUY THE RIGHT PART.
www.ebay.com
Other standard stuff that went was stuff like the cv joints, the boots on the left driver's side tended to rip more than the right. Alternator is easy on Vulcan, tough on the Duratec. Sway bar links would go all the time, I went with moog, the factory ones never lasted more than a couple years. Check the gas tank straps too, mine rusted away and one of them snapped, but the tank didn't drop.