Where do I get prism 3d updates

Here are 2 places that may do it for you.

3D Engine: Prism3D (http://www.mobygames.com/game-group/3d-engine-prism3d)

Fix Prism3d Engine Win7 Update Errors – Windows XP, Vista & Windows 7 (http://www.almuseo.com/prism3d-engine-win7-update.php)