I've always had good luck with Norton products. It just sounds like old stock plus you didn't say how long "awhile ago" you bought it originally.
Plus kudos to Home Depot for exchanging them for you when they could have been a-holes and told you no.
http://www.builders-hardware.com/default.aspx
Don't know what part of Western Washington you're in but these guys can set you up with commercial grade cylindrical door hardware for your house. What ever handle style or finish you want and they sell to home owners directly. Plus thier locally owned.
http://www.welders-direct.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=WD&Category_Code=S
This Smith set up is on sale at Central Welding Supply for $175 + They say free shipping anywhere in the US. Might be a good deal.
I curios as to your decision to pull the OSB off the back wall instead of just adding the drywall over the top of it. I'm assuming your house is a 2 story with living space over the garage. Usually this is installed for structural shear to the framing at that location.
You could have added a...