Trailblazer Part help

[leemack33]

Hi all, newbie here to the thread. I bought a cabin with a trailblazer model 21000/36000. The part in the picture is busted and I'm trying to figure out how to replace it. Does anyone know where I can find this part, or maybe know of a company that could make it? The knob on the left spins freely, so would need it to actually control the air intake into the fireplace. I've been looking for a while and I figured this would be the best place to search.

Thank you!

 

[Fake coal burner]

Check and see if ther is screws on the end of the dial houseing 1 or 2 each. if there is take the Trail Blazer houseing off see what is broke. take some close up pictures if the house comes off. and post back.

 

[begreen]

Is the knob off the shaft in the picture? This might be as simple as tightening the set screws on the knob if there are any.

 

[leemack33]

Here are the pictures.

 

[begreen]

This looks like a very simple mechanism. It should be apparent why it is not working. Is there a set screw on the knob?
First thing, clean it out then lubricate the pivot points of the damper blade.