Need an option to "Include a PDF version of the estimate" when sending by email

I would like an option to “Include a PDF version of the estimate” when sending an estimate by email. There is an “Include a PDF version of the invoice” option for invoices sent by email. It seems odd that there is no counterpart for estimates.

Now, I know that the customer can get a PDF by visiting the estimate link in the email, but I’ve removed this link because I don’t want customers going to the harvest website to view the estimate. Our customers typically approve an estimate (which I have renamed as “quote” in the translations configuration) by sending us a Purchase Order that references the Quote ID. So, the customer needs the quote as a PDF, so that their purchasing department can place the order. And, I don’t want my customer to have to do an extra step (visit the harvest site) to get the quote in PDF form.

Thanks,