NOS exterior door handles question

[newbraunie]

Recently purchased a pair of NOS door handles. Seller stated that GM shipped the driver side handle with the chrome push button and spring loose. I received the handles and there is no backing plate to mount to the back of the push button to hold it into place. Even if it came with backing plate I am not sure how I would attach it? They are GM parts with the part # on the handle. Anyone had any experience like this with NOS handles? I am inclined to return them at this point. Pic below.