Windows XP unpatched version

Hey there,

I study infosec. I do need an unpatched Windows XP version, to study some very simple exploits. 

Can anyone please tell me if/where can I find it (I've tried e.b.a.y. and a.m.a.z.o.n, but I cannot determine if the few versions they offer are unpatched).

Otherwise, can anyone please tell me where can I find good instructions on how to u.n.p.a.t.c.h a Windows XP SP3.

To be more explicit, I Do Need to train on MS08_067 vulnerability.

I do thank you in advance for helping me.

bye