Need to replace interior latch handle

The plastic catch piece on the interior side latch handle broke off. The lower part is a deadbolt which bolts through the door to a one piece exterior handle and key hole for the dead bolt. I find no name or numbers anywhere on the door or frame. The exterior hardware is fine. I need to find a replacement for the white, metal, interior latch handle. The holes for this piece are 1 - 3/4 inches apart from one another. There is a square steel bar that comes through the door and goes into the interior latch handle to operate the latch. The door is solid wood with metal laminates on both interior and exterior sides. I can provide more photos and information, if needed. Thank you.