I ReMixed from this thing https://www.thingiverse.com/thing:1721927
Firstly, I would suggest that you increase the size by up to 10% in your slicer, depending on how good your settings are. I found the MT2 to be tight on inserting it to the handle.
This is for an MT2 ER20 collet chuck
I hope it is useful
Generic PLA 1.75
What ever suites you