The base of our Sparkpeople food database (not member entered) comes from the USDA food database. It is very reliable and accurate. I would suggest you use a 3 ounce portion of T-Bone steak as the closest to your NY strip.
If you want to be even more specific go to the USDA site. You can select the type of steak consumed, the amount of fat that the cut has been trimmed to, if it is lean and fat, or just lean, etc, etc. ndb.nal.usda.gov/
Let me know if you need more help.
Your SP Registered Dietitian