Toplace make eyebrows and moustaches for customers, so authentic temple hair won't be a problem.
Like with the rest of your system, you define the temple flap area with your template and specify density and hair direction.
It pays to have a few hairs that lay directly downwards at the front of the temple flaps to cover the lace edge.

Have a word with John and I'm sure he can help you get it right if you supply pictures.