Fun gun to shoot, very flat trajectory, pretty accurate in my opinion.. Lately the price has gone up to $200-$275. You'll need to visit...
http://www.harringtonproducts.com/firing-pins/ for #2 firing pin, then..
http://www.gunsprings.com/SemiAuto/CZ.html#CZ52 for the 16 lbs recoil spring...

Couple vendors..
http://guncanyon.com/viewlisting.php?view=1784
http://www.centuryarms.biz/proddetai...prod=HG763%2DG ($220)price isn't listed unless you have your FFL called.