The newest PCM2.1 disc is part # 95504490361 and $290 from Sonnen for now, may go down a little more in the future. It is a 3 disc set, one to update the Nav drive, one to update the PCM, and one that has the newest maps. I don't think the map disc is available separately for less damn Porsche. From the looks of it you have the latest user updateable software and only need the new maps disc but as I said they sell it in a 3 disc set unless you can find one on Ebay or something. Just has to be a PCM2.1 Nav Maps disc,post '06, newer the better for maps, it can have a 955 or 996 part #. A quick look on EBay and I find a lot of '06~'08 discs for around $70~$100 but I can't see purchasing 5+ yr old data, maps, points of interest, etc... Keep and eye out on EBay for something newer or just go purchase a newer one from Porsche.

 

If you're in E. TN order from Hennesey Porsche in Atlanta, same deal as Sunset but shipping will be quicker/cheaper. I deal w/ Kenn.