I bought this cheap-o MAF from a company in Spain. Bosch 0.280.218.055. Porsche 986.606.125.01. It was about $120 or so.
It worked fine for about 100 miles and then threw a CEL. The code was actually for a catalytic converter, but I put the old MAF back in and the CEL went away. I took it out of the car and have it sitting on a shelf. I'm only looking to get $40 for it.