I've got an oil leak between the oil filter and sandwich plate for the cooler. When I bought the car it had the standard (Fram 2870) size filter on it. Previous owner (times 2) and builder of the car could not remember what size he used, but said it was a "double o-ring" type filter. Anyone recommend any type of filter, or know of a filter with 2 o-rings? P.S. it would have to have the same thread size as a Fram 2870, which fits fine on the plate, just leaks!