Looking for something like the dental CEREC MCXL or PRIMEMILL spindles

Doesnt have to be exact fit or specs

VVVVVVV important is the minimal runout, concentricity is vv important!!

They have pneumatic collet chucks,
Bur 3.5mm diameter
also need one with 1.5 and 2.35mm diameter burs

https://cadcamcenter.com/products/ce...fbS5-LRJZesVR2

https://cerecdepot.com/products/dent...0qy9WckJB7sB_1

https://www.ebay.com/itm/38757790655...Bk9SR5z0t93rZA

all help much appreciated!!