Finger pulls are broken on my Windows

We recently purchased a new home in Angel Fire New Mexico. Several of the finger ?pulls? are broken. We also have no markings or info on the windows themselves. There is a silver tag from the AAMA. It states:

Quality control and testing AAMA Certification Program, accredited by American National standards Institute A-L-I validation MFGR code B.B.-2

ANSI/AAMA 101-88 or AAMA 101V-86

R residential

Forced entry resistant.

I should mention the home was built in 1990.

Any help that you can give us will be deeply appreciated and you can count on me as a future customer.

Laura 

Thank-you so much, Casey?you are a genius. We had exhausted every other avenue, and you saved the day. We are also concerned about replacement screens?I?ve attached a closeup of one of the little-knobs/latches that are essential to set the screen in place. Each screen has two of these at each end. Do you manufacture them to size or are there standard sizes that you stock?
I will be ordering a pair of the top tilt latch shortly and hope that my husband can install, then we?ll be ordering all the replacement latches plus a few spare, plus we?ll be sure to keep your info in a safe place for the future.
Again, thank-you so much for your quick and very helpful reply!