Here's my boot dryer:
It's basically the guts from a $5 fan installed in a small Rubbermaid container. I use 3/4" PVC fittings on the top to attach a variety of doodads. I have some short PVC tubes with holes drilled for drying gloves. Sections of flexible plastic washing machine drain hose are used for drying boots. I can dry 6 items at a time. All of the doodads stow inside the Rubbermaid container for transport or when not in use.
The PVC fittings are 3/4" male threaded and screw into 1" holes drilled in the container. The same fittings screw into the ends of the drain tubing. It's basically a collection of cheap parts that happen to fit together and work well. It took a little experimentation and a couple iterations to get it right, and get it into a package that packs well for ski trips. The end result works really well.