89 convertible window regulator OR NOT

[ken1007]

Does anyone recognize what car from the 1980's this rear quarter panel regulator came from?  This one came out of  a 1989 Avanti convertible that used many  General Motors parts but that search came up negative.  At this point the last possibility is the junk yard, but need to know what model.  Does anyone recognize this regulator, the motor is fine but needs cable.  NOS is, reportedly, no longer available.  It was rebuilt 11 years ago by Window Motor World .