if you have a Titantv account (free to set up) you can add them
PBSHD for East
PBSHDW for West
If you have never set up one, you plug in a zip/postal for your area and load the antenna listings (thats what I did) then you can add virtually any station to the list (as long as they have a listing)
And I have a schedule of all the sporadic feeds that I made by staring at my sat box for a solid week during the summer. I cannot guarantee its reliability.