It strikes me (accidental pun, really!) that one could get a similar (and possibly more comfortable) result by taking a silicone or latex dildo of one's choice, drilling a small hole in the hind end, and inserting the handle of an ordinary tuning fork inside, sealing with the appropriate adhesive, letting said adhesive dry thoroughly, and then testing. Granted, latex and silicone will not transmit the vibrations quite as well to the orifice, but it'll be a reasonable facsimile.

That said, I think this is the only vibrator I'd be willing to try for sexual purposes.