Changing the Inline Entity Form autocomplete field to a select list

The Inline Entity Form module for Drupal is an awesome module. Most people probably have experienced using it with Drupal Commerce, but it can be used when ever an Entity Reference field is used. I have personally used it on many projects, most of which were not commerce related. Sometimes though, the autocomplete field to select an existing entity is not appropriate, say if you only have a few.....