The TEAM Lab has a number of Eisen S-3AII vertical mills available for checkout. Each has been upgraded with a ProtoTRAK EMX, 2-axis CNC Controller.
There are two, additional Eisen S-3AB vertical mills (Mill 5 and Mill 6 in EMU), very similar to the S-3A11, but have a larger, vertical capacity. If you are of especially short stature, you might find the S-3AII mills easier to operate (Mills 1-4, 7 and 8 on the EMU reservation page).
Both these are mills are also the ones on which the green permit training is completed.