Overloads for Rear

Does anybody make deul rate over load coil springs for 2002 windstar?All I can find is up to 1999.
Thanks.

No idea on the coil springs, I had a tough enough time just finding the OEM straight wound replacements for my 2000. Not sure what your goal is, but have you considered air bags?

I find when my 02 windstar is loaded. It sags and bottoms out quite a bit going down the highway. I have read on here about the windstar's that have air bags and the bags leak. Will I have trouble with air bags? I thought the coil springs are less trouble.

Not sure about the air bags you've heard about, the ones I have in my Nissan are Airlift Airbags and have a good reputation. They install easily inside the coil springs. I've had them in for a couple of years towing a boat and they really keep the vehicle level with no more risk of bottoming out. Plus you can air them up when you need the extra lift, and deflate them when you want to go back to original ride.

http://airliftcompany.com/new-index/Frameset.htm

If you cant find the springs. You could call around some places they could have them made ,but it would cost i am sure. The cheaper way are spring supports or wedges. They only ride good with a load though, you would want to remove them after your haul. May have air shocks for the winne not sure though.

How about these load adjusting shocks?

http://www.monroe.com/products/mp_detail.asp?cat=Sensa-Trac&detail=Load%20Adjusting%20Shock%20Absorbers