AFAIK, nobody makes a copper head gasket for the 107. And with all due respect, what is your basis for asserting that you can only re-torque copper head gaskets?

If you search "re-torquing head gaskets" on Google, you'll find many posts that suggest doing this anywhere from 30k-100k miles to prevent head gaskets from developing leaks, or before changing leaking gaskets on many cars, none of which have copper gaskets. And genuinesaab.com/psi/files/headretorque.htm explains how to do this for the SAAB 9-3 which also has an aluminum head, but doesn't have a copper gasket>

If, however, you can support your assertion in some way, I'd like to hear it.