M-Sport Bumpers & Wood interior trim

[elmo]

Just bought a 2004 ( ie pre- late 06 facelift) X3 3.0i Sport for my wife to supplement my 2006 E53 X5 4.4i Sport, which she does not like driving. A couple of queries about the X3. I want to retro-fit a M-Sport rear bumper. Is this a straightforward job? ( I know I need to paint the second hand bumper I have bought off eBay!). I notice that the factory M-Sport kitted cars have a finisher in body colour on the bottom of the tailgate - it seems much more substantial than the standard black flat plastic version fitted on mine. Anyone know about these? I am not going to fit the M-sport side sills as I have side steps fitted and I haven't looked into the feasibility of fitting an M-Sport front bumper.

My other question is about the "wood" interior trim ( door handles x4, console surround - for auto shifter). Are these easy to retrofit, assuming I can find any second hand parts? New prices from BMW are a little excessive for me.
Thanks in advance for any advice.