dynamically reference a structure of arrays of structure

<cfscript>
    testdoug = structNew();
    testdoug.dataarray = arrayNew(1);

    testdoug.dataarray[1] = structNew();
    testdoug.dataarray[1].finaldata = 'mary';
    testdoug.dataarray[1].guid = '100019';
    testdoug.dataarray[1].morearray = arrayNew(1);
    testdoug.dataarray[1].morearray[1] = structNew();
    testdoug.dataarray[1].morearray[1].finaldata = 'george';
    testdoug.dataarray[1].morearray[1].guid = '100021';

    testdoug.dataarray[2] = structNew();
    testdoug.dataarray[2].finaldata = 'ralpha';
    testdoug.dataarray[2].guid = '100035';
    testdoug.dataarray[2].morearray = arrayNew(1);
    testdoug.dataarray[2].morearray[1] = structNew();
    testdoug.dataarray[2].morearray[1].finaldata = 'lucy';
    testdoug.dataarray[2].morearray[1].guid = '100043';

    testdoug.dataarray[2].morearray[1].morearray = arrayNew(1);
    testdoug.dataarray[2].morearray[1].morearray[1] = structNew();
    testdoug.dataarray[2].morearray[1].morearray[1].finaldata = 'ethel';
    testdoug.dataarray[2].morearray[1].morearray[1].guid = '100092';
    testdoug.dataarray[2].morearray[1].morearray[2] = structNew();
    testdoug.dataarray[2].morearray[1].morearray[2].finaldata = 'lisa';
    testdoug.dataarray[2].morearray[1].morearray[2].guid = '100089';

    writeDump(testdoug);
    writeOutput("<hr>");
</cfscript>

This pattern could continue many levels deep.

Goal: Use structFindValue to locate a particular GUID. Then change the value of final data associated with that particular GUID.
Attemps to dynamically build the path in a variable then evaluate that variable to be able to modify its value have failed.

Challenge: Given the structure above. Search for GUID 100092 and change the value of finaldata from ethel to ricky.