I bet they are still going too, playing Stayin' Alive in someone's garage system right now, as we speak.
Edit: Don, your memory is fine, right down to the type number. I just scanned this from a 1976 magazine I'd remembered had the Sankens advertised in it.
View attachment 19195
I know those Sanken modules. Pioneer used them in their SA-7300 integrated amplifer. Silver aluminium front package, black writing. SP-40W or something.
View attachment 19193
Actually, IIRC, inside the Sanken modules (the first series), the output devices were through hole Toshiba TO-220s with the tabs cut down. I've got a pic someplace of a cut-open one.