| You might want to try
New Lee Tung Audio Visual 21470696
He is a pretty decent audio / video dealer (I'm assuming you want to remove the macrovision signals from your DVD or VHS output.) and might be able to help you.
Many of the DVD players available (specially the made in China gear) bypass the macrovision circuitry and it might be just cheaper to invest in one of those ($500 or so from any audio / video shop).
Also, you may want to wander over to Mongkok or Sham Sui Po. Tons of fake cable decoders and stuff available there. | 
Where can i get a macrovision filter? 
