A little off-topic, but I'm looking for a good place to get info on a 1999 Dodge Cummins turbo diesel dually. Anyone know of a good, free site? My dad's truck is leaking oil from a bad oil seal on the vacuum pump that drives the power steering unit. The truck is leaking oil as a result. Cummins is saying that the seal is not available separately and must be purchased as part of a $2200 unit! I'm assuming this is total bullshit.

He can't be the first to have experienced this problem, so I'm hoping to find some other peoples' solutions via the magical interweb. Any help would be greatly appreciated!