i get them from irc channels mostly because you can get the newest stuff
Just checked and this is the tiesto summer ones i have:
dj_tiesto-essential_mix__live_from_ibiza__10-08-2003
DJ_Tiesto-Live_From_Amnesia_Ibiza_29-07-2003
dj_tiesto-exclusive_set_at_eins_live_partyservice-09-14-2003
Just remembered why i didnt bother getting anymore; they all sound pretty much the same! the pvd closing set is definately available but i havent bothered getting it, i assume the tiesto one would have been recorded too.