If it were -possible to find a barber who is old enough to be experienced with straight razor shaving, and it is legal for him to use a sure enough straight razor in your state, find one. If necessary bring your own razor and let him shave you with it.
Other than that, an individual mentor with a lot of experience, or an SRP meetup that go on from time to time. That might be the best bet at this point IMHO.