Top 10 bricks missing from the Lego Architecture Studio - Tom Alphin
Where to buy individual LEGO bricks – Blocks – the monthly LEGO magazine for fans
I submitted a missing parts request to Lego, they accepted, there are a few things wrong with this whole thing. : r/legostarwars
Missing Lego instructions? You can download them online for free
How to get / buy Missing pieces for a set that came incomplete?. Missing pieces for step 5 (179 to 182) specifically in my Millennial Falcon set 75257 : r/lego
Missing LEGO Bricks or Instructions? Here's How to Get Free Replacements
Missing parts – Studio Help Center
I've had the very rare missing piece before, but have never received a piece that (according to the parts list) isn't even in the set! Bag 2 in the new Space Shuttle