Window springs

This is also related to post d77871 this is a picture of the spring and the hardware which the window fits in. These windows are double hung but do not tilt. the spring is attached to the top of the window mount which is plastic. The coil slips over the top and the bottom is attached too the item in omg 0286. This allows the the window to slide up or down with the spring holding tension. what i need to know is if you have the springs like this and how to determine which ones i need as several windows are not staying closed.

Thanks you

The friction shoe #15-104 is very similar to what is in my window. one of the parts needed is close to the tilt pin #20-16 but mounts with two screws on the lower side of the window. Have not seen any springs like the ones in my window. Have not idea as to who made the window, the house was built in 2003