You can contact them on adress :
[email protected]
or:
Czech Police Aviation Department
161 01 Praha 6, P.O. 614
BOX 35
Czech Republic
+420 974 838 251
Don`t know who is the boss there now, but would reccomend to contact Petr Fridrich Very friendly bunch of guys, running quite a big (and the second oldest in the world) police air support unit.
Make sure you plan for a seeing around the old town!
Regards,
hoistop