Nowhere to be found? Its everywhere we look- virtually every galaxy/galaxy cluster displays evidence of the gravitational influence of dark matter, same for the lensing of more distant galaxies and galaxy clusters. As the blog/essay admits in the second paragraph, what is absent are viable candidates for dark matter particles... but then we have no real idea whether its even constituted by a type of particle in the first place, this is only one proposal among many.

I don't think MOND should be categorically ruled out, for all time; new proposals add something to scientific inquiry even when they don't turn out to be correct, but MOND has a tough road ahead if its ever to be considered legitimately competitive with its rival theory.