Intermatic replacement gasket?

[thehowheels]

Can anyone help me locate a replacement gasket for an Intermatic timer?

I can't find a part number on the box anywhere, and I haven't had much luck browsing through the Intermatic website for similar units.

Is it possible that this gasket is not OEM, and added by the previous owner?

 

[jblizzle]

I would just go to the hardware store and find some foam weather stripping ... that is what it looks like to me anyway.