I made my template by copying one of LoudLon's tabs and taking out the numbers, substituting them with the dash. I use Courier for the font, and I hit Insert on the keyboard to go into typeover mode so I don't have to delete dashes to keep things aligned.
Or you can do like nick and I do and write your tabs on a template of your own making, then copy and paste your tab into the submission field. Personally, I use good ol' Microsoft Notepad, 12-point Courier New font.