加拿大采购需求：58mm 热敏面板打印机，ATM 亭打印机，ATM 打印机，廉价热敏打印机，kp-247，热敏打印机

I'm currently in the process of developing a new product and I'm interested in sourcing a specific thermal printer. I'm looking for a model that can accommodate tear-off thermal paper in the range of 2" to 2 1/4" in width. It's essential that the printer operates on low DC voltage, with a preference for 5VDC as the ideal choice. Additionally, I require the printer to support a serial interface and be compatible with both TTL and RS232 protocols. Please provide me with your recommended models that meet these specifications along with their respective pricing. Your assistance is appreciated as it will help us make an informed decision for our product development.