I bought a fantastic air compressor. It is compact, doesn't weigh much, and I carry it daily with my other 'essentials'. I paid about $70 for it, and many folks have commented on how much they like it and are interested in it for themselves. It is surprisingly powerful. I know you mentioned wanting the Porsche one, but if this will do for you, then bueno!
http://www.viaircorp.com/100c.html
• 0 To 120 PSI 1 Min. 46 Sec.
• 12-Volt
• Permanent Magnetic Motor
• Duty Cycle: 15% @ 100 PSI
• Max. Working Pressure: 130 PSI
• Amp Draw: 14 Amps
• Min. Ambient Temp: -40° F
• Max. Ambient Temp: 158° F
• Stainless Steel Braided Leader hose
• Dimensions: 6.25” L x 3.30” W x 4.90” H
• Net Weight: 3.50 lbs.