Wheel Horse 4999, 110513, 88-4400, 518213, 38-1420, 251-271, 251-210, 11139, 108483, 104-2874 Sealed Precision Heavy Duty Front wheel bearing. These are a heavier duty precision sealed bearing.
We've been using them here for awhile and they are finally in the store. 
They are here -
Front HD Precision Wheel Bearing