No OEM, auto or marine, has ever made their seals. In rare case some seals may be proprietary, but most are available through Motion Industries or other seal distributors as standard seals. Seals are sold by shaft outside diameter (OD), the bore diameter - seal outside diameter and thickness/height. Measure all of these dimensions and do a web search. If you get an odd size, convert it to mm. If you get close within .002 - 003", try the seal. They are forgiving and inexpensive.
