PabloCruise
SILVER Star
Black Hills National Forest Motorized Trail Permits
This is the link I used on my phone last club run on the way out o town. Takes a couple week to get it mailed but it emails you a digital copy as well.
This link gets you a little closer...
Black Hills National Forest Motorized Trail Permits
It looks like it does not have a "No Shipping" price for the pass if you opt to just use the receipt?