Is it an actual bolt or a roll pin? If it's a bolt you can probably use any shear bolt of the correct length even if you need to drill the hole larger. I think most shear bolts are 5/16. At least on my craftsman they are.
If it's something unique, as I'm not familiar with the 2 stage blower, try Ray's Mower. I'm pretty sure they'll have some.
sixchows is right. I'm sure 1 of the parts guys he listed will be able
to cross that Pt# to a shear pin they have.
Go to the Boles section of this forum and click on the 3rd thread
down called "Parts Suppliers" all their contact info is there.
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