I'm sure you're well aware of them; but McMaster-Carr is a great source for the stuff you're talking about (gas struts and drawer slides) ... not the cheapest, but they have great turn-around and stellar selection (plus they also sell in bulk).
Main Page - www.mcmaster.com
Gas Struts - http://www.mcmaster.com/#gas-springs/=hyowbd
End Fittings/Brackets - http://www.mcmaster.com/#gas-spring-accessories/=hyovvt
Drawer Slides - http://www.mcmaster.com/#drawer-slides/=hyowpo (don't forget to check out the other options under 'additional slides' on the left)