These set looks great together, the only problem is while the both the leg and feet pieces are rewarded by quests in The Lost Isle which can only be done by goblins, the chest piece can only obtained from a worgen only quest..
Anybody knows any transmorgrifiable version of above sets? I don't care if they come in different colours, as long as I can get them to form a matched look. I did found a black version of the pants but I don't think there are a transmorgable black version for the chest piece that can go with the black pants http://www.wowhead.com/item=6084#.
Nope. I looked into this a while back and ran into the same brick wall - as you noted they are only for low level, and even if you roll a new toon, you can't get more than 2-3 pieces of this set in any one color (there are 3 themes that I know of - the one on the goblin isles, the black one, and the brown/yellow one), because 1/2 to 2/3 of them are white quality...