Celestron Celestron 2 inch Diagonal (SCT or Refractor) - Camera Concepts & Telescope Solutions
Amazon.com : Astromania SCT Adapter for 2" SCT Diagonals - Convert Compatible Push-in (Refractor) Type diagonals into a Standard SCT Diagonal : Electronics
Altair 2 Inch Diagonal for SCT | Land Sea & Sky
Meade #929 90-Degree Mirror Diagonal (2") for SCT Scopes 07222