Sorry, but none exist.

There is a work-around however.

The play command will always turn on the DVD player if off, and if on, will play or do nothing if it is already playing.

Knowing this, you could construct a simple macro to get reliable discrete off consisting of PLAY, 2 second delay, power. Always works well. (You may need to adjust the delay time in order to allow the player to initialize before it recognizes the power command)

Hope that helps,

JJP