I ahve just finished paining up my M/T valve covers - only to discover thath the std oil breather rubber grommet is way too small for the existing hole.

The grommet outside diameter is 1.22 inches - but the valve cover hole is 1.5" needing something bigger than 1.5 to seat on the flange.

Can anyone point me in the right direction of where to get the correct size breather grommet?