Many of the public companies that still grant options use consultant benefit managers like AON(The old Hewitt) or Watson and both have sunk a bunch of change into pricing the longer stuff and often the two of them don't agree.
It's also why many PCs do restricted stock today instead of options. The options are a bitch to value and report. The original BS work was actually entitled something like valuing contingent corporate liabilities and the work was done relating to pricing farm equipment. An option by any name - still an option.
AON used to have a group to make a market in these.
Never heard of a Pubco having to outsource the annualized volatility calculation for Black Scholes to AON or Watson.
I prefer options to restricted stock. 4 month hold periods aren't an issue but nothing beats a shit load of at the money 5-year options.
Though restricted stock + warrants is a nice mix of both and Flow faster to my bank account.