Here is a remix of an awesome pillar I saw here on Thingiverse (https://www.thingiverse.com/thing:2656387). How cool is it, to be able to custom create Lego compatible pieces that would otherwise never be available? Thank You 3D printer!
Please print the test fit piece first. If you need to tweak the design for your printer, please go here, https://www.tinkercad.com/things/5jc0pT7XbOD . You can ungroup the pillar and adjust sizing as needed. Personally, my Monoprice mini printing in PLA at 0.175 layer height with 10% infill fits my legos perfectly! Hope it fits yours too!
P.S. It's equivalent to 10 normal height bricks tall.
Printing on a raft allowed me to remove it and not have to post process a stupid brim which made it more difficult to fit on other building bricks.