I have a AVT-852 with firmware to work with DHP software.
I sent my original DHP to AVT for them to fix but upon inspection they recommended I just upgrade (purchase) the 852. The 852 is nice because it uses a USB cable so no need for an adapter.
This has the analog inputs for widebands, egt, etc.
The price is $175 shipped anywhere in the lower 48 states.
It will come with what you see in the picture. I don't have the installation disc anymore but the software is available for download online.
This worked flawlessly with my laptop (win XP pro 32bit). I can't guarantee it'll work with anything newer than that as I've never tried although I'm sure it will.
PM if interested. Price is firm.
Flushing, MI for local pickup.