well don't know of exact numbers but HD-T sure should have good collection of them (CEE), yes maybe not all movie comes with spanish audio in CEE region so as i said look for multiple region discs as well you might find one with spanish audio, like TWN discs in chinese trackers like TTG, M-Team, HDArea etc and US transfer discs have spanish audios, BitHQ will be a great place for US discs. Don't know if all movies comes with spanish audio but if there is one am sure you will find one from these