If O.S. did not offer a pull start version there will not be a crank available.
Not to mention Tower is asking $92 for just the non-PS crank.
Several years ago before all of the +.21 big block trucks were available, anything over .21 was almost unheard of, and T-Maxx big block conversions were the norm, I seem to remember someone offering a pull start conversion for the V01b but I think they had to machine the crank or something to make it work.
Either way it seemed like a lot of work that would end up voiding the engine's warranty. Plus the picture on Tower's site shows an oil port on the V-Spec's crank so it probably cannot be modified in the same way.