replacement coil spring system

A quick learner from NJ says:
I cannot find the complete part should I just replace the coil? What part or parts are required
Thumbnail of the uploaded file named IMG_2408.jpg
A quick learner from NJ says:
The black plastic seems to be broken they popped out and I put them back in.
What is the parts needed to replace? Not sure what type of window no markings.
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Casey from SWISCO responded:

In your first photo, I believe I can see a stamp that reads "7R". Can you confirm? If so, have a look at our S140-7 quick tilt and see if this would make a good alternative for you. 

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