Computing Eigenvalue Density of Wishart matrices?

There’s a paper which claims to implement Eigenvalue density computation for finite size Wishart matrices in Mathematica, but the authors don’t include link/contact information in the paper, has anyone see this implementation by chance?

For large matrices it’s Marchenko Pastur, but for finite size matrices there are spikes –

I have not, but main PI has similar papers: Prof. Dr. Thomas Guhr