Use Powershell to replace text with image in Word document

I have a powershell script that uses a Word document as a template to create signatures that I am pushing out to my organization.

The document is populated with text formatted the way I want the signature to look, that I then do a FindText and ReplaceText on.  This works fine for replacing text with text, but I can't figure out how to properly replace some of the holder text with an image and a link.  I found a few posts about adding images to word documents, but none that seem to work properly in this scenario.

Any insight would be greatly appreciated, thanks!