Out of an Aston Martin DB11. (8HP70)
This would make a fantastic eight speed swap for your Corvette transaxle. The torque tubes are readily available on eBay.
I don't know the exact mileage on it but it looks super clean and I was told it was out of a wrecked DB11.
There are tons of companies that make controllers now for the ZF 8 speed. This one will hold over 500 ft lb of torque bone stock the way it is.
$2,000 firm firm or open to interesting trades.