Where is the best place to find the swirl patterns for wedding cakes?

Not sure, but do you mean scrollwork? If so. there are some excellent patterns in the "Templates" section of the Gallery.

It's a swirl pattern on the side of a wedding cake done in black fondant. looks like t was cut out a pattern

where is the template section on this site?

thanks

It's a section in the Galleries (click on the tab at the top of this page.)

Scroll way down to the category called "Uncategorized" (purple title) and it's under that, called "Sketches & Patterns & Templates".

It's right before all the wedding cakes.