No one needs re-invent the (P&L) wheel. At WMS this past January, a friend of mine purchased two gorgeous wooden locking card boxes specifically for Arthur Monroe's Voodoo. The source is:
Rachel Wild & Tom Jones
P.O. Box 602
San Antonio, FL 33576 www.wild-magic.net
I personally do the effect with two Tenyo locking card boxes I purchased years ago.
If you look through Practical Mental Effects (or Jinx), you will also find a version with envelopes.
Plus, Docc Hilford markets a version with envelopes and the spec's own unusual deck of cards. Re that, I'll close with some copy lifted from Little Egypt Magic:
A companion mss also suitable for seance workers is Mephisto's Journey, Docc's take (and, since the take is uncredited, his knuckles should be spirit rapped!) on Arthur Monroe's "Voodoo" from Practical Mental Effects. But what a take. In this variation, the spectator's own worn deck is sealed in an envelope and hidden away somewhere in a darkened home. The lights are extinguished. An eerie green glow appears, and the medium is seen holding the original deck. The spectator's chosen card (no force) is handed to her. Again the lights are out. When the spectator retrieves her deck from its hiding place, she removes it from the sealed envelope to find that the card she holds is indeed missing from the deck. Sweet.