You didn't mention 2.5 vs. 3.5 inch, so these may be one or the other ... it is far from a complete list, but should get you started. These all came from about 2-3 minutes of googling things like "R510 600GB SAS2" ... Dell doesn't publish a list of all possible part numbers.
900GB (you won't find any 900GB SAS drives at 15K, but you can look for 10K):
342-2979, 8JRN4, 342-4156, HGH3J
1TB (all 1TB SAS drives will be "Near-Line" SAS, which is basically a SATA drive with a SAS interface ... all run at 7200RPM):
MTKFK, 342-3520, 8CGTN