You can find LS1 MAF's all over eBay...I picked one up with the aluminum housing after a few weeks of searches, for about $45 shipped. Note that if you go with the LS1, with it's 3.5" diameter, you'll need to re-think your intake piping and connections to install it. I'm planning for a 4" K & N filter connecting to the LS1 with 3.5"-to-4" reducing coupler, then the other side will be a 3.5" intake pipe up to the turbo inlet with a 3.5"-to-3" reducing coupler. An LT1 MAF will fit more easily as it retains the stock 3" diameter throughout, excluding the air filter.