I know this post is almost 5 years old but I just found an unopened kit #8879 (from 1987) in a family home and if you still need them, I can scan and send a pdf of the instructions.
I know this post is almost 5 years old. Do you still need the instructions? I just found this unused model kit in a family home and while this one is from 1987, it is the same kit 8879. I can scan and attach if you still want it.