比利时采购需求：标准18音符乐章

I'm looking to design a carousel music box that rotates from a central point. Could you recommend a suitable set of mechanics for this type of design? I'm particularly interested in options for winding the mechanism from the side or from the upper platform of the carousel itself—though the latter is my preferred choice. Additionally, I'd appreciate a quote for an order of 20 units to be shipped to Belgium. Please include details on both mechanics you're able to provide. Thank you!