Recursive WPF data presentation without TreeView

Question

I have a particular unknown-depth model hierarchy which I want to present in a UI panel in a simplified form (no user interaction, no expand/collapse, just display parents and indent subtrees of children).

I have the following working fine as a TreeView, but it's heavier than what I want. Similar to how you can replace ListBox with ItemsControl if you don't want the user-interaction features, is there some way to replace TreeView with something else to get simplified UI and interaction? (I know, I could probably just template the TreeView, but that doesn't seem like the right approach either.)

<HierarchicalDataTemplate x:Key="SubcomponentTemplate"
                          ItemsSource="{Binding Subcomponents}">
    <app:ComponentInfoControl Component="{Binding}" Margin="2" />
</HierarchicalDataTemplate>
...
<TreeView ItemsSource="{Binding Subcomponents}"
          ItemTemplate="{StaticResource SubcomponentTemplate}">
    <TreeView.ItemContainerStyle>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="IsExpanded" Value="True" />
        </Style>
    </TreeView.ItemContainerStyle>
</TreeView>

The data model is basically a Component that contains a collection of Components called Subcomponents, each of which can have zero or more subcomponents of their own.

I've tried using HeaderedItemsControl in place of the TreeView, or inside the template, but it doesn't seem to pick up the subcomponents that way. I must be missing something magic.