http://www.sciplus.com (http://www.sciplus.com)
http://www.sciplus.com/category.cfm?subsection=7 (http://www.sciplus.com/category.cfm?subsection=7)
http://www.sciplus.com/category.cfm?subsection=4 (http://www.sciplus.com/category.cfm?subsection=4)
http://www.sciplus.com/category.cfm?subsection=18 (http://www.sciplus.com/category.cfm?subsection=18)
for makeshift vacuum pumps and the like.