加拿大采购需求：购物袋、衣物包装袋、塑料袋、垃圾袋、可生物降解垃圾袋、狗粪袋

We're looking to source custom opaque poly mailers specifically designed for mailing biological samples. We're planning an initial order of around 60,000 envelopes, with similar repeat orders anticipated every year for the next four years. Can your company manufacture these? If so, I'll send over a detailed technical spec PDF for you to review. I'd appreciate it if you could share your pricing and lead time for this product. Thanks!