You don’t, you just purchase the shares directly while they are a low price. But this isn’t really so complicated, a Roth IRA can own normal options, an option

You don’t, you just purchase the shares directly while they are a low price. But this isn’t really so complicated, a Roth IRA can own normal options, an options contract can be for anything, you just need someone to sell it to you and you need enough capital in the roth to exercise it.