I am wondering if someone can give an advice about where it will be possible to find used parts for a reasonable price for BMW X5. At this time, I am loooking for door sill plastic cover and wheel arch rear covers from the right side (passenger) of the car. Below is the link to realoem.com. I need the pars under number 3 and 4 from the image.
Any information is highly appreciated. Thanks.

http://www.realoem.com/bmw/showparts...61&hg=51&fg=20