请问HN：有没有提供简单零件的小批量3D打印服务？
我需要一些卡西欧SK1键盘的电池盖。我在网上找到了一个3D模型。请问哪里可以打印这些电池盖比较好？<p>交货时间不是特别重要，我更希望以成本为优先考虑。
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I need a few battery covers for some Casio SK1 keyboards. I found a 3d model online. Where is a good place to get some printed?<p>Turn around time is not terribly important. I would prefer to optimize for cost.