Birch lumber (s4s/s2s2e) for export to south korea

We are looking for a reliable supplier of kiln-dried birch lumber for indoor furniture frame manufacturing. Preferred size is 21×45×3000 mm. Surface finish should be S4S (preferred) or S2S2E. Knots and false cores are acceptable as long as they do not affect durability. We plan to purchase two containers this year and are open to long-term cooperation depending on quality and price.