Blizzard has stated:
We would like to offer some alternative ways to get favorite items that are no longer available, such as perhaps the dungeon tier sets or the DK start gear. This is something we will expand over time – not every favorite item will be immediately available at launch. But we’ll keep a list of items that get requested by the players and work to get them in someday.
I am one of the death knights who unfortunately vendored his starting area equipment to clear up bag space. However, I would like very much to be able to "wear" this set once more when patch 4.3 hits (or shortly after). The blue quest reward set is nice as well, but I'd much rather see preference given to the green starter set.
And so, let's begin a thread which may hopefully grab Blizzard's attention as a request from players to offer a means of obtaining this set once more, or a method of transmogrifying into this set.