Unfortunately the power supply is intended to be optional, as stated in the product's description,and we would not carry a compatible part. If you would like to source the power supply for the units, they will use the following specifications:
Product ID 8150 will require a 5V DC power supply, with a 3.8mm barrel and 1.3mm pin.
Product ID 8202's optional power supply specifications are 5V DC. with a 3.8mm barrel and 1.3mm pin.