I actually had to do a couple of further steps to achieve this, incorporating the above.

First, in the Scripted List script, I've included a custom element:

t.type = 'resource';

Then in the Angular ng-template called 'menuTemplate' on the main header Menu widget, I have made some changes to cater for my "special case" by adding the following to two places:

|| item.scriptedItems.type == 'resource'"

Here is my full Angular template:

<a role="menuitem" ng-if="item.items.length == 0 && !item.scriptedItems" ng-href="{{::item.href}}" ng-click="collapse()" target="{{::item.url_target}}" title="{{::item.hint}}">
  <fa ng-if="::item.glyph" name="{{::item.glyph}}"></fa>
  <span ng-bind-html="::item.label"></span>
</a>
<a role="menuitem" aria-haspopup="true" aria-expanded="false" ng-if="item.items.length > 0" href class="dropdown-toggle sp-menu-has-items" data-toggle="dropdown" aria-controls="{{::item.label.split(' ').join('')}}" aria-haspopup="true" title="{{::item.hint}}">
  <fa ng-if="::item.glyph" name="{{::item.glyph}}"></fa>
  <span ng-bind-html="::item.label"></span> <span class="caret"></span>
</a>
<ul ng-if="item.items.length > 0" class="dropdown-menu" role="menu" id="{{::item.label.split(' ').join('')}}">
  <li ng-repeat="item in item.items" ng-include="'menuTemplate'" role="presentation" />
</ul>
<a role="menuitem" aria-haspopup="true" aria-expanded="false" ng-if="item.scriptedItems.count > 0 || item.scriptedItems.type == 'resource'" href data-toggle="dropdown" aria-label="{{::item.label ? item.label + ': ' : ''}}{{::item.hint ? item.hint + ': ' : ''}}{{item.scriptedItems.count}}" title="{{::item.hint}}">
  <fa ng-if="::item.glyph" name="{{::item.glyph}}"></fa>
  <span ng-bind-html="::item.label"></span>
  <span ng-if="::!item.scriptedItems.omitBadge && item.scriptedItems.count != 'O'" class="label label-as-badge label-primary sp-navbar-badge-count">{{item.scriptedItems.count}}</span>
</a>
<sp-dropdown-tree role="menu" aria-label="{{::item.label}}" ng-if="item.scriptedItems.count > 0 || item.scriptedItems.type == 'resource'" items="item.scriptedItems.items" />