You could refurb and sell your dc07 if the 02 does what you need it to, there's a how to guide in the 07 room.
Never seen a yellowed DC02? Wow, I cant remember the last time I didnt see a non faded 02! The plastic goes brown/green. DC01, 02, and early 03's and 4's all did it, then they changed the plastics/moved to malaysia and it wasn't so bad