Could you do what Mark Cuban did and work with your brokerage to do sell calls & buy puts around the strike? That would lock in your price for a given amount of time.
If you had a sizable fortune at stake, you'd go to a major financial firm like Goldman Sachs, which handled the collar for Cuban, and they'll build you something custom. Almost any arrangement can be worked out, with a fat fee to go with it.
that said, options usually are available a few days after the ipo, so may not accomplish the objective