I asked here about ordering parts direct from China through Alibaba.  I was asked for an update:

Parts arrived, on schedule, about 5 working days.  Quality looks good, dimensions are all accurate.  Service was excellent, sales lady keeps following up to ensure they arrived and that I was satisfied.  Delivered for 1/4 the price of what the local Cat dealer's price was, not available through bearing house.

Company was called Focus Bearing out of Jinan China.  I do recommend them.