You could buy an aftermarket spoiler for less than ordering a subaru one at a stealership. Most are unpainted (hence being cheap), if you're handy enough or know a mate thats good at painting you could save yourself a few hundreds there too.
well i calculated the shipping cost for you on Japan parts.
It's 154 shipping to your door fully insured + 367 for spoiler = $521
Cheaper than the Subaru unpainted item from the stealership! 2 weeks wait tops! I ordered a double din fascia kit from them, took 2 weeks for it to arrive!