THR22 (DirecTiVo) Unit is Failing - What will they replace it with?

I have a THR22 DirecTiVo receiver that appears to be failing. When I call DirecTV technical support, the person on the other end of the line does not know what a TiVO box is and can't answer basic questions.

If I ask for a replacement box, what kind of equipment is DirecTV going to send me? Do they still offer TiVo boxes?