泰国采购需求：微动开关、防水开关、速动开关、东南开关、限位开关、微动开关

I'm inquiring about a specific micro switch from your product line. We're looking to purchase 400 units of a particular part from the KW3A series by DONGNAN. To help us proceed, could you provide details on the current stock available, estimated lead time for delivery, and the unit price? Additionally, we'd like to know the country of origin for this product. It would also be great if you could confirm the availability of the datasheet for this part. This information will assist us in making a timely decision, so I appreciate your prompt attention to this request. Thank you!