I mounted Warden 13s with 115mm brakes on some big skis that are 125 under foot. Worked fine without much bending. They are supposed to work on traditional skis that are 115 underfoot so the brake needs to clear more than 115 since the part of the ski it has to clear is not the skinniest part of the ski.
Fit looks find and I guess you will never know for sure unless you have the package or just ask the guy at the shop. (Never know if the guy at the shop might be going rogue though.)
Does any of that truth syrum stuff from the movies actually work? That is another option for you to research OP. You could tie up the guy in the shop and give him some truth syrum and see if he fesses up to using 130 brakes even though you specifically paid for 115s.