1981 Mercury 50 HP steering control

[flagflyfish]

Hello, I'm new to the forum, live in Alaska, and love running the rivers up here.
I have a Mercury 50 HP outboard motor (serial # 5632530) that I am trying to convert from a tiller handle to remote steering and control.
I have the motor controls (throttle and Jet gate) figured out, but am having trouble with the linkage needed to attach the steering to the motor with a tilt tube installation. can anyone help me with a steering arm kit needed to finish this retrofit?

[boats.net]

Oddly enough I am unable to locate a steering link kit for your model, you may however try one of the following parts.

89638a3
88320a1