英国采购需求：塑料袋、包装袋、气泡信封、聚乙烯信封、铝箔袋

I'm looking to source three different sizes of matte black coffee pouches equipped with degassing valves for our coffee roasting business. We need 1000 units of a smaller size, 2000 units of a medium size, and 1000 units of a larger size. Each pouch will feature unique designs on the front, back, and side gussets to create a distinctive look that aligns with our brand. Please provide me with your best pricing, lead times, and any minimum order quantities for these items. Additionally, I'd appreciate information on customization options and whether you can meet our design specifications. Looking forward to your prompt response so we can move forward with this project.