PUI seat foam?

I have a set of 72 Duster bucket seats and am recovering them with 70 Dart upolstery from Legendarys. The 72 Duster seat foam is all wrong for the 70 covers. PUI is the only company offering foam for the Dart seats... Has anyone used this brand before? And if so how is the product. Note 70-72 have the same steel seat frame.