Terry, I actually considered doing something similar a few years ago and looked at the pelletPro hopper assemblies. That's the way I'd go if it were me.
As much as I like the Stoven unit, it's really built for a kettle, is nowhere near as automated as the PelletPro unit, and not much less in price. Besides, the guy who owns the company had some health issues a few years ago and I'm not sure he's even doing anything with it currently.
Hope this helps!
Cliff