Is there one yet? I'm a bit weary about picking up a random E39 ECM and reflashing it with ours. I can't buy an ECM through GM since they are 'on restriction'. Here is my 'best option' right now.

OS on ECM: 12648907, 2012 Chevrolet Traverse 3.6L
Replacement ECM's OS (or at least the part number car-part.com has listed): 12643248, from 2012 Impala 3.6L

Thanks!