No graphite shaft will feel like a steel shaft, so just be aware of that. We can look at flex profiles and try to identify a shaft that might have a similar profile, but you can not duplicate the feel moving from steel to graphite. Performance, yes, you can find graphite that can perform as well or better than the steel. The 85-95 gram weight range in graphite limits the options somewhat. Most R flex graphite iron shafts are going to be 75 grams and below. In looking in our database, the only 85-95 gram graphite shaft that has a similar profile I found was the Steelfiber fc80 in their F3-R flex. It is a flighted design that delivers higher trajectory in the longer irons, but in the shafts we tested it has a similar profile in the .370 to the KBS Tour 90. Others that I found that had a similar profile but were lighter were the Mitsubishi C6 Black iron in the R flex at 78.5 grams and the Mitsubishi MMT R flex that is 73 grams.
Britt Lindsey
Sorry, meant to add for Regular flex.