<rich:extendedDataTable> <c:forEach> Displaying a table via a "Map of maps" - jsf

Question

I have a data model with structure : TreeMap < String, TreeMap< String, Double>> resultMap;
This is stored in a SessionScoped ManagedBean.
I am trying to output this via a dynamic < rich:extendedDataTable> where;
Key of first map is the row label
Value of first map is a second map ( corresponds to the columns on the row
Key of second map is the columns header
Value of second map is the columns value
Source Code:
<rich:extendedDataTable
value="#{queryBean.resultMap.keySet().toArray()}" var="key"
frozenColumns="1" styleClass="rich-extdt">
<rich:column width="75px">
<f:facet name="header">
<h:outputText value="Mediation" />
</f:facet>
<h:outputText value="#{key}" />
</rich:column>
<rich:column width="75px">
<f:facet name="header">
<h:outputText value="Test" />
</f:facet>
<h:outputText value="#{queryBean.resultMap[key]}" />
</rich:column>
<c:forEach items="#{queryBean.resultMap[key]}" var="map">
<rich:column width="75px">
<f:facet name="header">
<h:outputText value="#{map.key}" />
</f:facet>
<h:outputText value="#{map.value}" />
</rich:column>
</c:forEach>
</rich:extendedDataTable>
Output:
The first column is correctly outputting the keys of the first map.
The second column (used for debugging) is correctly outputting the map structure ( when I apply .keySet() to the structure I do get all the correct keys ).
Using: jstl 1.2.0, jsf 2.1 - mojarra, richfaces 4.x, tomcat 7.
Update:
As stated here, the < c:forEach> has no access to the < rich:dataTable> attributes, hence unable to use key. Is there any simple workaround to this?