The stem has reached the distributors, so whenever your shop can get them is when you will see them.
Here are the directions that come with the stem, so check these out before you ask questions.
36mm of available fork steerer tube is an important measure so you know if your current fork will fit(if you cut it down). Pay special attention to steps 5 and 6 to avoid under/overtightening
They may look complicated, but we wanted to make sure your bike is running smooth. You could make instructions for how to properly install a normal stem just as thorough.