If you watch the videos very closely of the machines used to pierce the Stiltons at the commercial plants the needles on the machine are angled. That way they don't have layers of veining but a more even spreading of the blue. Watch video at 3:41
Good Gorgonzola is readily available here and relatively cheap. Considering the two day process I think it may be a lot of trouble for little benefit. I much prefer the Stilton style cheese.