美国采购需求：透明孵化器，商用孵化器，数码孵化器，鸡蛋孵化器，在线孵化器，全自动孵化器

I recently discovered that I've misplaced a small yellow fitting for my incubator, specifically the one marked with the letter B. It's essential for proper functioning, and I'm eager to find a solution as I've got two of these incubators. Could you please guide me on how to obtain a replacement for this part? Any help or information on the next steps would be greatly appreciated. Thanks in advance for your assistance!