新西兰采购需求：手摇音乐盒，手摇纸质音乐盒，手摇木质音乐盒，手动音乐盒，18音符手摇音乐机芯

We are interested in sourcing a hand-cranked music box as a personal gift option for our customers in New Zealand. We would like to know the maximum melody length available for a custom song. Additionally, we're considering various order quantities—specifically 100, 200, 500, and 1000 units—so please provide pricing details for each volume. Furthermore, we are looking at two options for the product: one without any mounting board and another that includes a laser-etched timber mounting board, roughly sized at 120mm x 60mm. Any information on production lead times and customization options would also be appreciated. Thanks in advance for your assistance!