To answer your q no they didnt,
If it come with the 16x7 alloys it come with flares
RV and GXl top of the range model in Aus
As for Aus troopys they never came with flares, The RV model hdj78 and gxl vdj78 come with split rims so no flares, where as the rv hdj79 come with the alloys so they got the flares as with the gxl vdj 76 and 79. The gxl dual cabs in aus come with the alloys and flares on the front as they have a wide tray on the back so rare tyre dont hang out but in japan the top of the range dual cab still come with split rims and no flares because they have the rear tub and toyota didnt make flares for it (dualcab tub).
In saying that i have seen a pic of oem fj73 flares on a troopy so i presume the wheel arch are they same shape and size not sure if the sub tank filler is back abit more than the troopy rear quarter panel
https://www.transautomobile.com/pics/1621/transautomobile-toyota-land-cruiser-pick-1621-791559.jpg?
Is this an oem flare for dual cab?
79