Willow Design today announced three new dust covers for the 17″ iMac, eMac, and G3 iMac. Each dust cover is custom fitted to cover the desktop, keyboard, mouse and extra speakers. The covers also feature special mesh openings at the rear to vent excess heat from the computer in case it has been left on in sleep mode or turned on accidentally. The Trade Wind G4 iMac Dust Cover (US$19), Stratus eMac Dust Cover ($19), and Nimbus G3 iMac Dust Cover ($17) are available now.