Thanks everyone for your input. I decided to make my own out of 1/32 stock. I'm replacing the two back-to-back crankshaft seals. The Deere PN AA5122 R cross-references to National PN 415995 if you drop the R. All of you probably already know this, but it won't work. Diameter dimensions are OK, but the thickness is .375", the Deere part in .325" thick. Two seals at .375" puts the outer seal about .125" outside the casting by the time you allow oil hole access on the inside. Maybe this info will help someone looking to save some money. You gotta go with Deere, no one else could find another seal that would fit.