mower deck blades

I have a custom 6 with a 38" roper deck on it. I am looking for replacement blades but turning up nothing. The blades have the double D hole in the middle. Looks like two capital D's back to back. It looks like they are no longer in production, please post any good resorces for these.
Thanks Chad

I think I answered my own question.. this site seems to have the hard to find blade, I will know when it shows up for sure

mowpart.com has all the blades you need for that...i get mine there.....and get 2 new blade adaptors to......