I finally received the part that I order a month ago.
It is not much, only $15.74.
The part# is 51 16 9 252 106
Very easy to do, took me 15~20 minutes, most time consuming is unplugging all the connector since they are very hard and tricky.
So, here are the pictures of my DIY. Apology on non focused picture.
The parts itself
Original Stock condition (What a waste of space!!!)
Step 1:
Remove the rubber mat on the bottom of the compartment, and you will see the 2 screw on the bottom. Lift up the cradle and you will see 1 screw behind the base.
The 4th screw is the tricky part, you have to remove the fan cover then pull the fan outward gently as there are wires connecting the fan to the power supply.
Screw position:
2 on the bottom
1 behind the cradle
1 behind the fan
Step 2:
Once you got all the screws out, pull the cover gently as there are some cables behind it.
Then unplug the cable 1 by 1. You might want to use small flat screwdriver to push the tab down.
Removed cover.
Step 3, which is the last step unfortunately.
Put the replacement cover to its position and it is all held down by clips, no screws needed.
Make sure the bottom 2 tab inserted to the position first.
Afterward, replace the rubber mat on the bottom of the compartment.
Yay!!! I got plenty of compartment space now.
Good luck and have fun with the small project.
Let me know if help needed in getting the parts.
~ Ben