Want a free tool for checking U inventory? Give this a try: http://www.wandr.me/tools/Multi_Bucket_Inventory.aspx.

Very much in beta still right now (among other things the carrier drop-down doesn't seem to be particularly limiting and it times out on occasion returning zero results) but better than nothing. Any feedback on functionality or bugs is welcome. I'm also working on incorporating the same search functionality into my alerts tool that emails you based on certain fare buckets but that's not quite ready yet.