I purchased this one for both my APW3++

https://www.amazon.com/gp/product/B004WJM2V0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

https://www.amazon.com/dp/B00WND4W56/ref=psdc_597260_t1_B004WJM2V0

It's working great so far - good luck!

edit: 1st link is unavailable but 2nd is the same cord.