This question is for SR3 -

I see the rules for buying a fake cred stick, but where are the rules for making your own? I'm a Decker and I see references to making one, but I can't find the rules. Can someone help me out?

If I recall, there so much work involved in building these they have to be mass-produced by illicit syndicates.

I may be extrapolating based on a single line of fluff (and I've pretty sure I am), but I just can't see it any other way.

EDIT: SR3. Right. Uh, I forget about SR3, but I would imagine it's similar still.

Yes the task of hacking all the data bases need to make a half decent fake Sin is herculean. As is making the cred stick.
It is the province of specialised sysndicate operations that have the connections and decker stables to do it.
And thats SR3.