Yes you can buy all of them from Dell.  I have provided the DP/N of the drive (bare) and latch.  I am not able to find the odd bezel DP/N at this time.  Some third party vendor may sell the odd with a generic black bezel included.  It may not be the exact same black color to match the 8950 night sky bezel color, but the difference might be subtle to notice.  For a genuine 8950 black bezel, chat w Dell parts support online.
I would like to install a stock ODD (optical disk drive) in my XPS 8950. It was shipped with the drive but the first owner removed the drive prior to sale. My front bezel has the slot so I'd like to make use of the opportunity!  I'm trying to determine the correct drive, bracket and DVD/CD bezel. It seems that 09M9FK might be the correct Dell part number but I can't confirm. I also can't find the mounting/bezel kit. My front bezel is gray. There are hundreds of 09M9FK on eBay but none say they fit the XPS 8950, though I suspect they might. Can anyone provide some help on determining the correct device and where to find a mounting kit? Thanks!
XPS 8950, ODD, brackets