Idea

This seems like a fine idea. In the meantime, you can actually write some FlexScript that will help. The following script finds all text with at least one regex match. It prints the node and line number to the console. It doesn't find all matches within a node, though. But it should narrow down your search considerably:

treenode root = model();
int searchNames = 1;
int searchText = 1;

Array toSearch = [root];
while (toSearch.length) {
    treenode target = toSearch.pop();
    
    toSearch.append(target.subnodes.toArray());
    treenode attr = target.find(">1");
    while (attr) {
        toSearch.push(attr);
        attr = attr.next;
    }
    
    if (searchNames) {
        int index = target.name.search(/MaterialTable\[\d\]\[8\]/g);
        if (index >= 1) {
            print(target);
            continue;
        }
    }
    
    if (target.dataType == DATATYPE_STRING && searchText) {
        int index = target.value.search(/MaterialTable\[\d\]\[8\]/g);
        if (index >= 1) {
            int line = 1;
            for (int i = 1; i <= index; i++) {
                if (target.value.charAt(i) == "\n") {
                    line++;
                }
            }
            print(target, ", line ", line);
        }
    }
}

RegexSearchDemo.fsm