I don't have the exact model number of my computer, but its an RA model and is the black one pictured in the attached photo. I need the PSU and will consider buying the HD, too. If you DO have a PSU for this model, please PM or post here and we'll compare model numbers of the PSU to see if its one I can use.
(Side-note: The middle of this case is open for cooling purposes. Some newer models don't have this I believe.)