UPDATED 4/24/2013: These harnesses are currently available and will remain so for the next few years at least.
I make adapter harnesses that are plug and play for installing any of 2g, 3g or Evo air flow sensors to your 1g. Here is a representative picture of a 3g/Evo harness.
The 3g/Evo harnesses are typically made with all new parts. On occasion I make them from pigtails.
The 2g harnesses are made from pigtails.
I can now make harnesses to connect a 3g/Evo maf to 2g or 3000GT/Stealth vehicles. There are some pics further down.
Any of these are sold for $37 shipped (in the US). I will ship overseas for the additional actual cost. Check my good guy posts. I take care of my buyers and these are a quality product. I know you can make your own, but I think many of those who have bought these will tell you they are worth it for the reliability.
I can do custom work as well if needed, including special lengths, standalone hookups to the stock car harness, etc.
Any questions, please pm me.