The recipe I used is from Kraft Foods.Com.
I changed it by leaving out the ricotta cheese and egg. I just mixed the remaining cheeses and also added a small amount of shredded chedder cheese. Sprinkling the cheeses on the layers was much easier than trying to spread the original cheese mixture described in the recipe. I also only used 9 lasagna noodles. It came out perfect. I think it would need a little more than a cup of water to use 12 noodles.
You could also save money by getting the sauce on sale/with coupons or use generic.