absolutly stunning suriname boa, love the tail and the silver grey body colour.
maybe try a live rat pup, the eyes are not even open yet, and they cant even walk yet, so they can't do any damage to your snake.
or try a live pinky and then straight after he takes it try a FT while he is still in feeding mode, he should take it.
my big boa I got recently wont eat FT yet, I have to give it Freshly killed and sit there for half an hour busy doing a death dance lol I have tried FT for a few weeks now and she is not interested, the guy before me fed it live its whole life and it has a scar on the end of its nose because of it

im so upset about that. but I will get it to eat FT eventually just takes time with some snakes.