Search doesn't work right now, but I faintly recall posts
about a revised upper timing belt cover to fix this problem
(I guess they just made it taller). Ask about it at the dealer.

According to Ford, you don't have to replace the timing
belt just because of this. I'd put those washers in though
(or the revised cover if it exists) for the peace of mind.
Removing the cover also works fine if you're into ghetto
looks.

T.