I will take your suggestion and copy some more time markers and prize ribbons. I may not need them; I'd prefer to play with 4, but I'd hate to turn someone away who is interested!
You won't need to make more prize ribbons, but instead of drawing 6 for the shows, you should draw 8. As for the time markers you can use pennies if you want. It's not as thematic, but it's certainly easier than printing something.
Understand that I'm merely surmising on the number of prize ribbons and time markers. I haven't tested any of this for 5 players.