1990 Multi-Function Chime Module

Does anyone know where I can find a Multi-Function Chime Module for a 1990 Olds Custom Cruiser?  I thought it was the same as the alarm module but when I went to replace it they were not even similiar.  The part number is 10119605 but does not exist in the parts and illustration book.  It is however, in the shop manual with instructions on testing and replacing.  It is part of RPO Y67 Reminder Package.  I put the part number into the interwebs and no hits, just a Massachusetts tax form!  Is it possible for a part to just disappear?