as far as what hernan said from the tracklistings, check out the charts & radio show sections... there you'll see names of tracks...
as from where to get them, they'll be most easily available from specialized record stores, as for example
(cheaper option but releases take a little bit longer to get there)
(most upfront stuff but quite expensive)
I would recommend to search for online record stores in Denmark specialized in progressive house and progressive trance, which is the style hernan plays... try googling a little bit.