Lindsey Adelman makes beautiful lighting. She also teaches visitors how to reproduce her own works in a detailed PDF document supplemented by links to online retailers of the necessary parts.
Warhol is praised (and prized) for making unique art in the age of mechanical reproduction, artists like Adelman are to be credited for adapting to the age of digital reproduction.
Update: friend CP points me to Enzo Mari’s 1974 Autoprogettazioni (diy projects) as a precursor. Mari produced plans for do-it-yourself furniture.