This 1981 profile,by Buchheim et al.,according to Hucho is the most 'aggressive' profile which will still retain attached flow over the aft-body
The AST-II is the second-most aggressive profile and fits standard rooflines with rapid descending contours.
The AST-I fits more conservative contours.
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All these profiles are just conservative contours which would prevent rapid pressure recovery which could trigger flow separation; based upon empirical wind tunnel testing.
They are intended for home-made,owner-built, individual aft-body streamlining projects.
Anyone with a full-scale wind tunnel or class-leading CFD capabilities will be able to achieve the same results for $2000-$4000/hour,plus materials and labor.