My seamstress made what she called ~ a crop top, where the arms were long sleeve, and it was cut high above the bustline. But it still had a hole for your neck.
I was looking through patterns today. And, I found a free one for the top.This following pattern doesn't have a hole for the neck, but there are several ideas you can mimic. The following pattern is called a shrug. And although it doesn't have welt seams along the arm, you can get some ideas. What you only see of the top on zam is the arms and shoulders anyways. I would give more material inside the front shoulder area than this pattern, but you get the jist.
I am thinking of more of this (top left shrug), in pattern, but with longer sleeves: (be aware, this pattern is for a lacy top, not for tricot neoprene, I wouldn't know how the ease affects the rest of the pattern. )
Or this: http://www.lanetzliving.net/inc/sdetail/1056 with a shorter back and front cuts above the bustline.
After posting this, I realized I should have posted this under KayDee's suggested patterns thread.