There are none available that I can find from JD or any of the after market suppliers for that serial number.
Do you have any black smiths around you??? You can take a set of straight blades and make them into suction blades. You can do it with a big rose bid heating tip but a forge works better as you can get the whole end hot at once.
I have done it on other mowers. I just heat the whole end red hot and turn the back edge up. I make both side match in height. I then anneal the blades by oil cooling them. Take a grinder and balance them and you are good to go.