Interconnecting Seatalk 1 to Seatalk ng device

Hello All I have a C120 chartplotter that I had a Raystar 125 GPS antenna hooked up to on the seatalk 1 network but the gps quite working. I just bought the new RS 130 GPS antenna and it runs on the seatalk ng network. Does anyone know how I can wire this new gps antenna to my existing seatalk network without the Raymarine Adapter kit? The material I find on the internet seems to just talk about hooking up seatalk 1 devices to the seatalk ng network. I want to do just the opposite. I want to hookup a seatalk ng device to a seatalk 1 network if possible.