Keith,
There is only one place that I am aware of that has a specific driving school for Cobra's. You even are required to bring your own car! Bad news is..... it's a long way from Seattle and Portland.
http://www.cobrauniversity.com/
Portland Raceway has driving schools but you are limited to their cars. Not sure about Seattle track.
http://www.portlandraceway.com/
This is OK because you learn proper driving techniques, but as you are aware a Cobra does not preform like most modern cars and all the different Cobra cars drive different.
Personally I would recommend a driving school first. Then a specific school with your own car. The old "learn to walk before you run" methodology.
I was thinking that it would be cool for a group from the NW to make a trip down to the Cobra School in CA some day.
"Road Trip!"
Regards,
Mike