Lodge makes several nice griddles. I have one similar to this
clickthat's probably 10 plus years old.
We also have a cast iron kettle, two skillets, and two different size Dutch ovens (probably about 60 lbs.)We also use cast iron a lot at home.
The easiest way to cure it (which Lodge says you don't have to do) is to coat the piece inside and out with vegetable oil (or lard if you prefer) and stick it in the oven at 350 for about an hour. I've also done the same thing in a really hot campfire. It stinks to high heaven but it gets the job done.
I NEVER put soap and water on a cast iron piece.