I have a hitch for a 2005-09 Subaru Legacy sedan. Are you still in the market? I bought for $150 but will sell to you for $100 plus shipping. My wife didn't let me put it on her car. It's a class III 2" receiver. Hope this helps.
A good source for information is calling Ben at Execuhitch. He is good with advice when figuring out what to install, for what etc. They have the hidden automated hitch, here is his number 678-400-0121