I came across this product if you translate the language to english. It say it works with several banks even they named the banks. Even you can use your desire led when comes in contact with POS. Check it out.
NFC Payment Implant P1 289,90 € - 489,90 € The NFC implant with payment function 100% Made in Germany Made in Germany Pay with a hand movement at the cash register. Our NFC Payment Implant P1 lights up in your desired colors and is record-breaking with a range of up to 5 cm. The self-configurable LEDs indicate data transfer as soon as a reader or POS system approaches. Thanks to the certified and innovative design, the implant can be bent in the middle of its biocompatible sleeve, greatly simplifying implantation.