Yes, we usually have a couple of 120 GB or 250 GB Samsung EVO 8X0 SSD.
You can take one if you order a new one (or your Local IT order for you) and replace it.
Here are examples from produktwebben with current (2015-02-17) prices:
Contact firstname.lastname@example.org as usual to replace your harddrive.
Remember, if you do this on your own and open your computer
yourself you got to know what you are doing.