Two neutered doe's and a neutered buck can be a very successful bonding. It does depend on the personalities of all bunnies concerned. I have bonded some quite easily, and in other attempts it has not worked at all! And, it is true to say I have known of situations where the previous bonded pair have fallen out big time, and the owner has been left with a happy neutered buck and doe, and a separate doe needing a new friend!
To be honest the rescue should help with this. Most rescues will do the bonding for you, if they have the facilities. Are they happy to do so, and if you did have to do the bonding yourself would they be there with support, and be willing to take the pair back if it did not work out?
Good luck, Alice