Both paper and plastic 3D glasses can be bought at Amazon for a reasonable price. I tried the below glasses and they work well, but a friend already broke a pair.

http://www.amazon.com/3D-Glasses-Variety-Pack-Magenta/dp/B0038ND4A4/ref=sr_1_6?ie=UTF8&qid=1313616376&sr=8-6

The Elsa Revelator glasses can still be used on XP machines without an ELSA graphics card. All you need is an NVidia graphics card and their old stereo drivers. MS didn't support them in Vista, so you'd have to have kept an older computer that runs XP. NVidia now has a more expensive 3D stereo package that uses a different format and the new drivers aren't supposed to be compatible anymore with older page-flipping glasses.

http://www.nvidia.com/object/3dstereo_91.31.html

 

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon