It is a bit frustrating that BMW has already made such a visible/noticeable change to the E90 ///M after only one production year. But, having only seen the 09 tail lights in pictures, I'm not sure if I like them any more than the lights on the 08s.
Your best bet to find a set of 08 style tail lights that will be all red is to look on eBay and take your chances there as I am not aware of OEM lights that will meet this criteria.
I have found Blacklines, as well as LED tail light conversions on eBay but have hesitated pulling the trigger on any of the auctions as it's always a crap shoot buying from eBay sellers I don't know.
Anyone have any reputable sources they can point us to?
2008 AW E90 M3 - current
2002 TIAG E46 M3 - gone
1991 DiamondSchwartz E30 M3 - gone but not forgotten