There are several companies that offer custom lapel pins with no minimum order quantity.
PinMart offers custom lapel pins with no minimum order requirement. They have a wide range of options for customization including different shapes, sizes, and finishes.

GS-JJ: GS-JJ is another company that specializes in custom lapel pins with no minimum order. They offer various customization options including enamel, die struck, and printed pins.

Lapel Pins Plus: Lapel Pins Plus provides custom lapel pins with no minimum order quantity. They offer a variety of styles including enamel, die struck, and printed pins.

CustomLapelPins.com: CustomLapelPins.com offers custom lapel pins with no minimum order requirement. They have a user-friendly online design tool to help you create your custom pins.

Signature Pins: Signature Pins is known for its custom lapel pins with no minimum order quantity. They offer various styles such as soft enamel, hard enamel, and die struck pins.

Before ordering, make sure to check each company's pricing, shipping costs, and production time to ensure they meet your requirements. Additionally, consider requesting samples or proofs to ensure the quality and design meet your expectations.