I used to be in the same boat as you years ago: I had RR and ecuflash, but needed my ROM defined (2013 Impreza). I ended up getting so desperate that I broke down and placed a $300 "bounty" on it, on RR's forum.
My best advice: spend the $150 for Epifan's subaruEdit Personal software. There is a lot of back and forth to get it registered, and if you have any problems with flashing or logging you'll find out that the developer has the customer service attitude of a rattlesnake, but the software is great. Best money you'll ever spend.