There's a program called stereoscopic player that allows you to take side-by-side, interlaced, over-under, monoscopic and SIS 3d video and play it back in just about any 3d format:
- Source
- Monoscopic
- Dual Screen Output
- NVIDIA Stereo Driver
- StereoBright™
- Quad Buffered OpenGL
- Sharp 3D Display
- 3D Enabled DLP-TV
- SIS Attachment
- Side By Side
- Over/Under
- Row Interlaced
- Column Interlaced
- True Anaglyph Red - Blue
- True Anaglyph Red - Green
- Gray Anaglyph Red - Cyan
- Gray Anaglyph Yellow - Blue
- Half Color Anaglyph Red - Cyan
- Half Color Anaglyph Yellow - Blue
- Color Anaglyph Red - Cyan
- Color Anaglyph Yellow - Blue
- Optimized Anaglyph Red - Cyan
It's not terribly expensive and the quality is MUCH better than DIY or most other similar software.
But what IS important is you can grab the free demo version, register the .dll and using GraphEdit convert the 3d format. (I believe the registration limitation only effects the player and not DirectShow filter.)
Details for conversion here: http://www.3dtv.at/Knowhow/Conversion_en.aspx
All you'd really need then is a VHD player and a standard output you can send to a PC capture card.
That's just off the top of my head... btw, did they ever do the 3d version of Kiss Me Kate or Hondo?