Mura CMS : If a Mura 'component' exists, then the object will be returned, otherwise an empty string will be returned.

dspMuraComponent.cfm

<cfscript>
// drop this in your Theme or Site contentRenderer.cfc
public any function dspComponent(string componentid, siteid=variables.$.siteConfig('siteid')) {
	var bean = IsValid('uuid', arguments.componentid
		? variables.$.getBean('content').loadBy(contentid=arguments.componentid, siteid=arguments.siteid)
		: variables.$.getBean('content').loadBy(title=arguments.componentid, type='Component', siteid=arguments.siteid);

	return !bean.getIsNew() 
		? variables.$.dspObject(object='component', objectid=bean.getContentID(), siteid=arguments.siteid)
		: '';
}
</cfscript>

<!--- Usage --->
<cfoutput>
  #$.dspComponent('Some Component Name or ID goes here')#
</cfoutput>