convert triangle to quads while using getVerticesData() and getIndices()

[dsman]

So for simplicity assume that I only have a box in a scene. 

<mesh p="0.5 -0.5 0.5   -0.5 -0.5 0.5   -0.5 0.5 0.5   0.5 0.5 0.5   0.5 0.5 -0.5   -0.5 0.5 -0.5   -0.5 -0.5 -0.5        0.5 -0.5 -0.5   0.5 0.5 -0.5   0.5 -0.5 -0.5   0.5 -0.5 0.5   0.5 0.5 0.5   -0.5 0.5 0.5   -0.5 -0.5 0.5        -0.5 -0.5 -0.5   -0.5 0.5 -0.5   -0.5 0.5 0.5   -0.5 0.5 -0.5   0.5 0.5 -0.5   0.5 0.5 0.5   0.5 -0.5 0.5         0.5 -0.5 -0.5   -0.5 -0.5 -0.5   -0.5 -0.5 0.5" nverts="24" verts="0 1 2   0 2 3   4 5 6   4 6 7   8 9 10   8 10 11   12 13 14   12 14 15   16 17 18   16 18 19   20 21 22   20 22 23" />

In above xml  'p' is what we get from getVerticesData() function of mesh and 'verts' is what we get from getIndices() 

 

Now as we know babylon deals with triangles. My requirement is generating xml like given below

<mesh P="1.000000 1.000000 -1.000000     1.000000 -1.000000 -1.000000     -1.000000 -1.000000 -1.000000     -1.000000 1.000000 -1.000000     1.000000 0.999999 1.000000     0.999999 -1.000001 1.000000     -1.000000 -1.000000 1.000000     -1.000000 1.000000 1.000000  " nverts="4 4 4 4 4 4 " verts="0 1 2 3    4 7 6 5    0 4 5 1    1 5 6 2    2 6 7 3    4 0 3 7  "/>

How do I easily get such (quads) vertices and indices data format ?

[GameMonetize]

The brute force option could be to duplicate the third vertex