First off, we need waaaaaaaay more information bro.
Your CPU is most important, but everything else would be nice too so we can keep in mind how hot everything else is going to make your rig.
So post your specs.
Then you need to find out the socket of your current motherboard, and then you need to find out which CPU was in the workstation and verify they are the same socket.
Honestly though man, cpu coolers are ridiculously cheap. You should have just bought one. And I doubt anything else in that workstation but the hard drive(s) will be salvageable.