I have the HTC2000 mobile base for my bandsaw ($49 from Amazon with
free shipping) - I just put it together, and it seems to work great so
far. For my bench drill press, I found (on ebay) casters that lock
both the swivel and the wheel rotation, and mounted those under a
cabinet to make a rolling tool cabinet/drill press base.
Both systems are fairly new but work well so far, and are lots easier
than trying to slide the tools around.
Andy