the majority of the items that were given away at the Galena Illinois 2013 rally were donated by companies that we asked to donate and a few of the venders and members of our fine .org. 
A  few of the items were purchased at  cost or less than cost from 
  Gieson Motorsports Yamaha of Rock Falls Illinois along with several items that were hand made by Shirley Haywood and Shari Schepp and my wife Cherie.   
it was just a matter of asking folks to donate items of value that they can make, or that they have lost interest in and some of the things had nothing to do with motorcycles, but were of value or interesting to someone and was small enough to be able to pack into or onto your bike or trailer.   
the items that were made by the members seem to have been the biggest hit and were more fun than the bigger ticket items from what I could see.