The car sputtered and died. It was towed to an AAA garage who determined it needed a fuel pump but wanted mega bucks to do it. I called my mechanic friend to come and get it and told him I would buy a new pump and get it sent to him to put in. The car restarted at the AAA garage and I drove it up on the trailer. It had sputtered into life when it had died but when I pressed the schrader valve on the fuel rail there was no pressure and it barely ran. It had sputtered and lost power a few weeks earlier. It had missed a few beats a month ago. A local garage had determined it needed a new Fuel pressure regulator which was installed. It ran fine for a month.

I suspected critter action as it was always full of chewed acorns when I looked under the hood. When my mechanic looked at the current problem he was not able to see a part number for the pump and because it has a metal tank it seems a bit different.
When he opened the PEM there was corrosion visible inside the cover. It took me a lot of internet searching but I think it uses the same pump as an S60 and have ordered a W0133-1835654 pump and a used PEM 30769225 even though the original was a 30636431 I hope these are right but I will not know until they arrive next week. It seemed to make sense to replace them while it was opened up the car is 16 years old with only 145,000 miles so I hope to be trouble free in that area for the next foreseeable future. The critter action still haunts me though. Thanks KlausC for the response.