PIC16F877A need desperate help!

my Boss has a machine the previous owner had custom built in the early 2000's. recently this PIC16F877A chip went out and the Engineer that originally wrote program is retired and not consulting. so my question is it possible to make a copy of the program on this Chip and put on a new Chip? My boss does have basic knowledge on programming but is missing a few key factors. We really dont know where to go to possibly find anyone that could possibly help us. So please If you have knowledge on this let me know.