Trust me. If for some reason they cannot accommodate you, PM me as there could be a couple of other ways to get that tank.
Have you seen their 12*12*24"h? Not listed anywhere either. This tank could be interesting... I was toying with the idea of putting the tall one inside the shallow cube for a cascading ripparium build. Maybe some day.
Courtesy * Integrity * Perseverance * Indominable Spirit * and Self Control
Tenets of TKD