ERA builds a turnkey for somewhere in the $50K range before optionals and it is a true turnkey, get in, turn the key and drive away. Witing period is about a year.
Their web site is
www.erareplicas.com.
It won't be a "COBRA" but it will be a "replica". If you want to know the difference take about a month off and go through all of the threads here.
DonC