Are you looking for this type? This blade is OEM 450mm with screw type connector. I used to have the 400mm version but they have been discontinued. Or are you looking for wiper blades that were actually around in 1984-1988? Maybe a different type that I do not know about??
I bought these at my local dealer because I was tired of the play in the screw type to J- type adapter for aftermarket blades giving me chattering wipers. They were still available from Toyota (at least in the U. S.) when I bought them a few months ago.
Pretty sure he's looking for the oem style when the trucks were new. I had one truck with that style of blade, but it was trashed. Top appeared to be stainless and if memory is right, it screwed in with 2 screws, not the clip in style which I have a pair of that are trashed too.