Unfortunately it just is not that simple. You might be able to get torque and TOT figures with their equivalent FLI figures from the relevant flight manual (for instance for the EC135T2 13.5FLI equates to 128% TQ and 13FLI equates to 125% TQ) However, when you are N1 limited, the maximum N1 will vary depending on pressure altitude and temperature. So, at one location, 10FLI may equate to 99.7% N1 but at another location, or the same location on a different day, 10FLI may equate to 102.2% N1[Note these are completely made up figures].
Sorry I can't be more help but if someone can send you a copy of the limitations page from the RFM for the B2, that might give you a starting point. It's possible that the scales are not even linear.
Cheers
TeeS