The following artist is good choices for fursuit reference sheets:  neonslushie *

There are also free to color bases available here:  free2use

Be sure to read my terms of service as well: http://www.furaffinity.net/view/13717090/

*We are in no way affiliated with Neonslushie. We simple feel that their reference sheet are the easiest to work from, due to their simplicity in details, and their ability to show all of the markings that would be used in creating a suit.