I have an LS1 MAF in my car, I paid $130 for it at Autozone.
I also programed my car to run the LS1 MAF.
Replacing something like this REQUIRES programing. This is not a plug and play part. At least not for the LA1 motor.
You can buy a CAI on ebay now, usually for less than $100 (probably less than $50) but you'll want to buy a good quality air filter. K&N is really the best option for this. I found that K&N part number RU2430 works very well. They may have filters now that have the inverted K&N on top of the filter too, but for inside the fenderwell (which I don't like using on a daily, others do) the RU2430 works perfectly. Clamps on 3 inch pipe perfectly and just fits inside the well. Also works great under the hood. I paid $35 for mine, but that was a few years ago. I'm sure the price has gone up since then.
I've giving this part number out before, and others liked the fit too
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12