Forever doors EMCO

The door is still in good condition, it's just the whole lock that needs to be replaced (inside and outside with key). Went to Home Depot and they said they don't sell the parts to this old door no more. The handles I believe my mother threw out, but they were like an oval shape. They kept coming out from their hole so it was no point in keeping them in. I do hope there is a possibility to still keep the door. Thank You!
P.S Also the info on the door is in one of the pictures I sent above.