Or you could keep the stock pan and get a cover/plate for it. It's cheaper than the greddy and it gives you peace of mind. There are several types of plates out there of varying price, just search around.
Like this:
http://www.aspecproducts.com/images.asp?theid=6376
There was also a tomei copy pan at rnd factory, but when I just went to their site it was gone (?).