Cayenne Oil Pump and Timing Chain replacement 4.8L

We currently are working on a 2008 Cayenne 4.8L and were working through an estimate and repair on the Timing chains on this vehicle. In the kit it includes oil pump drive chain and a new sprocket. My question is is this something that anyone has had experience with or with out replacing during a timing chain Job. I looks like it requires the engine and trans to be removed from the cradle to allow for oil pan removal. Trying to figure out our options on this one. 

Thanks