COBB doesn't make their inconel up pipes anymore (ghey) as Chris told me when I emailed him about it a few months ago:
"We discontinued the inconel up-pipe this summer. It was awesome being able to offer it for a while, but the price of inconel and tripled since we started making that up-pipe. $385 was already a lot to as for an up-pipe so imagine asking $1000+. Soon we will be discontinuing our stainless up-pipe as well as none of the newer Subarus have cats in their up-pipes."