Where can I download old versions of PhysX plug-in for 3dsMax ?

Can anybody help me, please ?

I need PhysX plug-in versions 2.85, 2.86, 2.87 for 3ds Max 2011 and 2014 for running RayFire plugin.
The version that’s downloaded from RayFire support site doesn’t work
(Max2011 couldn’t load PHYSX4DCC_PhysXCore.dll).
Thanks in advance.