Searching for 1529

Looking for pivot pins for tilt in windows of unknown brand. The two from the bottom of the top sash both broke when my husband tried to force the window back in place when it was not in the proper alingnment in the pulley tracks. See attached images. Looks like the number 1529 in this piece. Both left and right parts look to be the same. The windows are at least 13 years old (put in prior to my owning the house. ) thanks!