There are a few designs available to make a quarry Hunslet on the kato 11-109 chassis, but they tend to be a little on the large size in order to fit on the chassis. You can remove outer moulded parts (careful, it holds the motor in place!). This is a remix of another design, but I've scaled it down to fit on a stripped down chassis.
https://www.thingiverse.com/thing:5860503
There are two other Kato tram chassis available without the mouldings 108 and the 110.
THey will slot in under 3D printed bodies as well.
Stan.