+1 for Velosteel.
In Colombia they are standard equipment for workbikes. They are rather inexpensive, usually under 25 USD hub + cog.
What driver style did you get? There is your ordinary driver that works with the usual coaster brake/3 speed cogs; but there is also a version that is threaded for an ISO track cog and lockring. Reputedly, this second version lasts significantly longer due to the sprocket being screwed on.
http://yarchive.net/bike/torpedo_hubs.html
Here is some information on the (spiritual?) predecessor of Velosteel (formerly Favorit) coaster brakes.