If you are having a desk lamp like this one:
http://lh6.ggpht.com/-dcj_ok6HVkg/TnbkfxaIXVI/AAAAAAAAJ3w/d9q7epujD28/IKEA%252520Computer%252520Desk%252520Lamp%25255B9%25255D.jpg?imgmax=800

and the connection between lamp and folding-frame breaks, you might just print this. It replaces the weakest link and can be strengthened by addind a screw.