Here is the delta I have. It's a Benchtop unit and isn't the biggest thing in the world but I think if I repurpose the motor to be a dedicated belt only unit I could get it to work.
Sorry if the pictures are big i don't know how to resize for this forum.
Another option would be to make an attachment for my drill press which has beyond enough power to run a 2"x**" belt. I'm thinking something that can bolt to the drill press table and just swivel the table 90 degrees so it's not directly underneath the press and take the belt off of the drill machine and run it to the top of the sanding unit.