Folding-Bed Bulgaria Import and Export Companies

I am looking for a producer of castors for folding bed We are looking for a supplier of castors for a guest folding bed, see the attached picture with the product.

For now we urgently need to buy 500 pcs of tents for 6 persons, 4 seasons. And also we need folding military beds 10000 pcs in total but 3000pcs