Does anyone know of a good source for lace templates?

www.elegantlacemolds.com They're molds, not templates.

Thanks, but I was looking for a template or pattern that I could use
to pipe a lace-like design on the sides.

You should try sugarveil; it's a bit of an investment, but well worth it and easy to work with!

Do you mean like a stencil? globalsugarart.com carries quite a few stencils that are lace patterns....

Since I'm running out of time and probably can't do mail order w/o paying a lot for shipping, I was thinking more of a drawing that I could trace onto the cake (well maybe trace onto wax paper first and then use a pin to transfer the pattern to the cake??). I will definitely check out sugarveil and global for the future.