Custom template hook question

[BBR-APBT]

I want to add a custom template hook at the very end of the footer template when installing a product.

The last line is there is </div> so preg_replace wouldn't work. Which is why I decided to add a custom template hook.
I am surprised there is no template hook called template_hook.footer_end.

Would any one be willing to tell me how to do so?

Thanks in advance.