We're using Magento and Amasty FPC 1.6.10. I'm attempting to holepunch a small part of a .phtml template (in this case, it's the defaule page\html\header.phtml template), but I am having trouble finding any instructions on how to do so.

According to this documentation, there are ways to holepunch custom blocks, blocks w/ ajax, and CMS blocks, but nothing about how to do it when blocks aren't involved.

Any help would be much appreciated.