I have no experience with the reproductions.
That said, the image shows the internal rear spring basket used in 1970-71 cars - but NOT 1972-74.
They do not show the latch type, could be 1970 to early 1971 or the later 1971 up type.
There is not a 'Duster specific' bucket seat frame. The A-body buckets used the same frames as the E and B bodies in any specific time period.