Big Thanks to VLAD-MARIUS ( https://www.thingiverse.com/VLAD-MARIUS/about ) for publishing his lego compatible basic bricks!
I repaired the broken meshes with Microsoft's Builder and filled the holes under the knobs. I also enforced the 1x? bricks. Now all the Bricks are way more FDM printer friendly!

The bricks are similar with the brick numbers shown.
The "L" means that the brick is large ( 1 large brick = 3 small bricks ) .
The "S" means that the brick is small ( 3 small bricks = 1 large brick) .
--> i personally wasn't able to print the small bricks very well because of big bridging issues. if you succeed, please let us know how you did it !!

See the Original Models for further Information and give the author some credit:
published by VLAD-MARIUS
LEGO Brick 1x1 - large [Nr. 302201] - www.thingiverse.com/thing:879108
LEGO Brick 1x1 - small [Nr. 302401] - www.thingiverse.com/thing:825015
LEGO Brick 1x2 - large [Nr. 300401] - www.thingiverse.com/thing:1007112
LEGO Brick 1x2 - small [Nr. 302301] - www.thingiverse.com/thing:1002522
LEGO Brick 1x3 - large [Nr. 362201] - www.thingiverse.com/thing:1496588
LEGO Brick 1x3 - small [Nr. 362301] - www.thingiverse.com/thing:1331072
LEGO Brick 1x4 - large [Nr. 301001] - www.thingiverse.com/thing:2216171
LEGO Brick 1x4 - small [Nr. 371001] - www.thingiverse.com/thing:2098258
LEGO Brick 2x2 - large [Nr. 300301] - www.thingiverse.com/thing:1219050
LEGO Brick 2x2 - small [Nr. 302201] - www.thingiverse.com/thing:1146407
LEGO Brick 2x3 - large [Nr. 300201] - www.thingiverse.com/thing:1647473
LEGO Brick 2x3 - small [Nr. 302101] - www.thingiverse.com/thing:1576035
LEGO Brick 2x4 - large [Nr. 300101] - www.thingiverse.com/thing:2216285
LEGO Brick 2x4 - small [Nr. 302001] - www.thingiverse.com/thing:1765509