I ordered one of these and the lamp shade was broken when it arrived. IKEA refunded me said I didn't need to ship it back, so, 3D printing to the rescue!
The fit could be a little better/tighter, but it works well enough. Also the hole in the base isn't big enough to fit most bulbs, so you'll need to screw in the bulb after installing the shade.
Prints in about an hour with vase mode @ 0.30 mm layer height. White PLA turned out great.
The author marked this model as their own original creation.