Need some new leaf springs... Help

I need to get some new leaf springs for my '89 Dodge Ram 150 (318 TBI). It's RWD, and the back end sags with even a light load in the bed. Any aftermarket companies make something that I should be looking for? Or maybe just try to find some used ones?

The truck only has 79,xxx miles on it and is only used for hauling parts to Carlisle each year, and transporting lawn equipment around town.

I need something that will support a decently sized load of parts.

Any help is appreciated!

try theses guys

http://www.eatonsprings.com/

I got new springs for my 57 Belvedere from ESPO. They've been on the car for a couple of years now and are holding up fine.

ESPO on the Road Runner over 10 years no problems.