Hi,
During one of my searches I came across a site that has user manuals for many brands of vacuums. Not all brands or machines are covered here but some of what they have on had may prove useful those who've lost their originals or have acquired a new or used machine. Best part is that the cost is zip.
http://homeappliance.manualsonline.com
The Sears website seems to have loosened up a little too. As they have so many brands to handle you may go online and browse for parts for most of the brands they sell.
Venson