Because of my own research I have a lot of experience implementing models from papers and converting other code to Matlab. By the way it is also possible to just call the Fortran or C++ code from within Matlab using Mex-function, but since it's such a small think, it probably makes more sense to just convert it to Matlab, especially if may like to make changes to it.
I only produce high quality, structured, efficient, documented and heavily tested code, and this is on a short deadline, therefore I charge a bit more ...