If you are looking for great griddles.. I'd also recommend taking a look at the MOJO griddle. While I ended up not buying one, it's a great looking product. I followed a similar design to build an 20" griddle for my 18" kettle. One advantage that it can provide is that it covers the entire cooking surface for making eggs, bacon, pancakes, stirfry, etc. It really has opened up an entirely new recipe line on my kettle. Anyway, thanks for the info on the Craycort. I could see how having half surface could be beneficial.
If you are handy with steel, you could probably get this exact size cut from a supplier on ebay for around $30.