UIComponent panel = null;

if (uiView.panelsLibrary.m_DynamicPanels != null)
    foreach (var p in uiView.panelsLibrary.m_DynamicPanels)
        if (p.name == "ZonedBuildingWorldInfoPanel")
        {
            panel = p.instance;
            break;
        }

if (panel != null)
{
    // Panel exists!
    // ...
}