Well this one guy DID find a d3dx10_42.dll. So there is still hope for DX10.
Thats good news for me, and everyone else who can only run DX10

PS: Crytek's website says that CryENGINE 3 Supports DX11, So Why Would They Not Use It?
"Crytek launched the third version of CryENGINE? in October 2009, which is the first game development platform for Xbox 360, PlayStation 3, MMO, DX9/DX10/ DX11 that also is truly next-gen ready."
http://crytek.com/company
Ha! Eat that DX11 users! LOL!
I'm just trolling since I only have DX10.1.