Shoes import request from Slovenia

we are establishing a clothing business in Slovenia and currently we are searching for manufacturers and suppliers.
The company will be established in 2 years.
We have a few questions about your factory.

1.) Could you please tell us some references of your company (which companies you work for)?
2.) Which companies supply fabric to you, or you make it by yourself? Is it high-quality fabric?
3.) In case we choose your company, do we need to sign a contract?
4.) What are the costs, we