Replying to I need help from a ski tech

What's going on guys,

Just need some insight from someone who works in a ski shop or gets this kind of thing done often enough that would give me some accurate info.

So I am probably adding some Faction Somas to my quiver for this upcoming season for an all mtn park set up, because it got a little tiring shredding on the 3.Zeros in the Catskills of New York, although they did surprisingly well. I mounted my 3.Zeros with FKS 140 bindings, a decision that I am now regretting because of this situation. I was thinking that I could slap some Guardians on the 3.Zeros and put my FKS on the Somas, but they issue would be the 115m brake that they have. Approximately how much would it cost (minus the price of the Guardians), so take off the FKS, get new brakes for the Somas, mount them, and then mount on the Guardians? Is this something that most shops would be able to do? Or should I just sell the FKS, they are in great condition, to someone on NS, and buy some STH's like I should have in the first place.

Thanks for the help.