I've tried many materials, they're either too thick or too thin.
Does anyone have a Pushrod wore that is just the right size for the servo holes, and is stiff enough?
Want to buy some if anyone is selling.

RCBAZAAR sells those wires 20 rupees for  a meter of it ..
i used 1mm carbon fiber sticks with a U bend attached to its end... worked well for me..

They don't have it listed on their site

Edit: My bad, searched for pushrod, instead of push rod