Was able to get the frogger to spawn at the helipad during the Pac/Std today. Saved the usual way for escape. Might be just due to the snow but it's still easier than getting one off the police station.
Why is the helicopter glitch patched by Rockstar's idiots? It is actually a legal means of escape. Apparently Rockstar wants to make it as difficult as possible for players to make money. This indirectly forces many players to buy the Shark Cards.
I've seen it spawn there a few times too. There must be some trick to making that happen. Someone I played with sweared that it'll spawn every time if one person drives to the police station first. But even if that's true, at that point, the police station guy might as well take the heli there.