I am getting back into competitive pistol shooting (which I have not done since my military days) and wanted a bag to rest the barrel of my pistol for sighting in. I bought this from eBay for less than $9 USD. Looking at it, I realized that it could very well be used as a "bean-bag" lens support. Nine bucks is a lot cheaper than most photo bean bags run...
http://www.ebay.com/itm/261880647948