Looking for Parking Space near JFK (June-August)

[RealBlackStuff]

My wife and daughter are currently in the USA and plan to come to Europe between June 18 and August 30, 2007.
Is there a reliable good soul, who lives near JFK (NY or NJ), and where they could leave their car safely for the duration?
(It's a big Ford Econoline Chateau 7-seater)
If so, they would connect with you on their way (using Interstate 80 from PA etc.) to JFK, you go with them to the airport and take the car back to your place. On their return (which will include me as well), you would collect us from JFK in their car, we'd drop you home and be on our merry way.
They/We'd be most grateful and look forward to your assistance with great expectations.

[RealBlackStuff]

I have the exact dates and times now:
Depart: June 18, 9:40pm
Return: August 30, 1:00pm
Both in JFK, Terminal 4.