This item is the exception to things available in spring 2007.
This was likely to have been available as a set from either JC Penny or Kohls stores in the winter of 2006-2007. You've seen the pants part before (paired with a different top) on another page of this section. Both items feature reflective striping, and lots of primary colors.
This is little-kid size only, and was likely not available in all areas of the USA/not in all stores. You may still be able to find it on ebay...just don't expect it to fit.