Need Patch 1.05b for Crashed System

[Fatboy]

My PC disk crashed recently & I have to had to rebuild my system.
I am midway thought a PBEM Grand Campaign with 1.05b RC3 & need to rebuild RUS to this version to continue the game.
Unfortunately I can only find 1.06 to download & this doesn't work with my saved games.

Does anyone know where I get a copy of the patch 1.05b RC3?