Gun part?

I need a mainspring guide for a junk 22 rimfire revolver. Dickson model cheyenne double action, made in Germany. I know it is not a quality firearm but it would make an excellent trapline pistol. Any idea where I could order this part?
Thank you. I have had no luck online.

 

Thanks, but they do not even list "Dickson" as a mfg. I am sure that it is a clone of another mfg but I have no idea which one.

 

I would guess the Ruger, as it has a coilspring.

 

But the top of the guide is different.

 

I doubt that the gun is worth even one hour of a real smith's time. It would be a great trapping gun because I would not worry about sand, mud, etc as much.

 

If any other specific photos would be helpful please let me know Thanks for trying