Needing information on 69 key in, lights on buzzer

Yes I realize that by reading the TSB. However does anybody know, will a PN# 3579201 for 71-73 A body work on a 69? The 1970 one is also a one year only part as well and would also be hard for me to get. Theres plenty of 71-73 A bodys in my local boneyard that I can pick one of these off of.