Rear coil springs 04 Freestar
 

How come I can't find any after market coils springs for a 2004 freestar limited? Only place I can find them is at the dealership.

By the time you find someplace else to get them, it might cost more than if purchased from a dealer.
And they should be the correct ones.

173.00 each from the dealer. I think thats way over priced for just a rear coil spring. I'm changing the front struts and springs today and I only paid 158.00 for two complete strut assemblies.

If you want to upgrade your rear springs for a slight lift and a little more weight capacity, then I would go this way (From my Freestar library)

FREESTAR Rear Spring Upgrade

The following coil springs will fit the rear coil spring brackets on the
Ford Freestar/Mercury Monterey for upgrading the weight capacity.

1990-1996 Bronco (Front Coils)
1975-1991 E-150 (Front Coils)
1980-1996 F-100/150 (Front Coils)

MOOG part number CC820
AC DELCO part number 45H1024
ROCKWELL part number RV820

All are sold in sets and probably range from about $75-100 per set.

I opted to buy and install aftermarket coil airbags that fit inside the coils and are adjustable via air pressure. I got them off e-bay for about $75 and they have been working well for the last 4 years. When I have the trailer on I pump them up to 30 lbs and the van stays level and reduce the pressure to 5-10 lbs when the van is empty. A simple option if you don't want to go with OEM springs. Additionally, you could try RockAuto.com as they tend to have OEM and aftermarket options to cover the price points.
DB