With a little work, all of the achievements in Starbound can be obtained using console commands
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Find a safe spot in-game, such as on your ship or at a planetary base.
Place the mouse cursor near to your character, as this is where items will spawn.
Press ENTER to bring up the dialogue box in the bottom left of the screen.
Type /admin
Press ENTER
(You only need to type /admin once. If you're doing several achievements in a row, typing it again will turn off admin mode which we need to get the achievements. The dialogue box will tell you if you just turned it on or off).
NOTE: Press ENTER after every command to activate the command, and press it again to bring the dialogue box back up. After pressing ENTER, you can use the up arrow on your keyboard to scroll through your recent commands.
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The commands you need to use for this particular achievement are:
/spawnitem alpacahead
/spawnitem alpacachest
/spawnitem alpacalegs
Press I to open your inventory. Make sure you're wearing the full outfit - achievement unlocked!