Identify Window Balance, order parts.

A 7L (Pretty faded) is stamped on the balance.
These two parts came out of the window track on the right side of the window, looking from the inside--out.
I'm believing the parts on the left side of the window are similar.
Do they come as a set or do they have to be ordered individually?
I need to repair two of these same style windows.
There is a third piece that came out of the track as a part of the coil at the top but I was at my limit for pictures. I can send it if you need it.
Thank you in advance for your assistance. Looking forward to your reply.

Val.

Referred to Ref. # D290126