Fulfillment Services - Integrated with CS-Cart


I am looking for a Fulfillment company to store and ship my products. Have about 500 SKU's, each item is small.

I was looking at Amazon. They are expensive, but offer many features. May test them.

I have seen one that was integrated with several carts. but not CS-Cart.

Was wondering if anyone has any experiences with any Fulfillment companies, and know of any that can integrate with CS-Cart.

I am looking for a company in the US, preferably with an East Coast distribution area.