The hoses going to and from the power steering reservoir are regular leakers.  I suspect this is partly due to their close proximity to the hot exhaust header  and partly due to the oil that they contain.  Replacing them is a little more difficult than expected, I'm doing this little job as an aside to the front engine reseal. For that I have the pump and lower belt cover removed.  This gives me a chance to clean things up and replace the old fitting with the updated version. 

I say updated because that is just what it is. Evidently Porsche realized that the old hose routing could be improved with a shorter version. Instead of being routed around the front of the water pump. The new hose drops down near the oil filter. 

As such, the new hose is shorter and gets a new fitting to be installed on the pump (the old one would work too). Note the new reservoir. 

Side Note: I completed this same upgrade to my Budget NA but instead of using this $40 formed hose, I used common power steering hose from the local auto parts store. It works fine too, just be sure it is kept clear of the belts.

The other line that connects to the reservoir (shown above) can also be replaced. It is swaged to the power steering fluid cooler. To separate the rubber portion of the line, I had to first remove the cooler assembly and use an abrasive cutting disk to cut the collar.  From there, a short piece of common hose was used to replace the line. This worked well on both my NA and my 951.  

Side Note: Occasionally I stumble into the Porsche listings in eBay - one of my favorites is seeing the sale of used power steering reservoirs.  I always get a chuckle out of this because new reservoirs can be purchased at a number of sources for $22 to $26. A really brave eBay seller will place a $20 starting bid...;]