They're not, Avalon released datasheet for them a while ago. And they are using different clock frequency and different voltages.
There's still a lot of components to rescue though perhaps? New PCB, a few resistors to set the voltage and a different oscillator?
From glancing at it, it looked like the comms protocol was similar but I might be wrong.
The real problem is that the rapid growth in the network makes anything like this too risky. It will be interesting to see what happens to this auction.