Nice review. This cigar is the L'Atelier 46, and yes it is hard to find. I spoke with Pete Johnson about this particular cigar and they produce limited quantities due to the limited supply of the wrapper. The 46 wrapper comes from only the top of the plant and are set aside for this 46 line. The regular lines are L'Atelier 52, 54 and 56 (all three much easier to find than the 46).
Also, if you enjoy the L'Atelier try the Cabaiguan Guapos. Another excellent cigar by Pete Johnson. It's also medium strength with medium to full flavor. Very smooth.