I'm not all up on Patton Model#s, but this is an older unit, correct? You may try contacting Patton (Owned by Holmes now so you may have to go through them)
If they cannot help you, try www.dtvintagefans.org There's collectors there that may have parts fans that they may be willing to sell a blade.
Alternatively, you may try Grainger, as they sell an assortment of blades. You will need to match a blade to your motor though, which should be fairly easy as the Patton fans use a common McMillan motor which most attic fans also use.
Answers & Comments
I'm not all up on Patton Model#s, but this is an older unit, correct? You may try contacting Patton (Owned by Holmes now so you may have to go through them)
If they cannot help you, try www.dtvintagefans.org There's collectors there that may have parts fans that they may be willing to sell a blade.
Alternatively, you may try Grainger, as they sell an assortment of blades. You will need to match a blade to your motor though, which should be fairly easy as the Patton fans use a common McMillan motor which most attic fans also use.