Dell premier mouse and keyboard - USB dongle replacement

Hi guys.

I have lost Dell Universal dongle for my Dell Premier mouse and keyboard combo KM717, and when connecting with Bluetooth to Dell Precision 5520, it goes to sleep, or from connected to paired. The issue is when i connect and use Bluetooth headphones Philips. If i remove headphones mouse and keyboard work fine... But i still want Bluetooth headphones to be connected as well... Since there is no part number and you cannot buy just dongle, i am looking for an option to buy cheapest Dell wireless mouse WM126 that comes with dongle and use i's dongle to connect Dell premier KM717. the question is, is dongle that comes with mouse WM126 supports KM717 keyboard and mouse combo?