Looking at the hobiecat.com site, not sure if the big decals are still in stock. The smaller 6-8"? Hobie Cat on a diamond background, or in line with stripes, seems to be the latest offering. The bigger 12-16"? Hobie Cat (see attached pic) was on the earlier 90's boats. The parts diagrams list a 13002201 and a 13002001, but it's not clear which is which. The parts diagram in the latest catalog doesn't show any part numbers for hull decals.
My suggestion is that you email some US dealers (Backyard Boats in Virginia for example) and ask them to check on both of the numbers listed above. If they have some in stock (unlikely), measure them and see if it matches your requirement. I can also trace over my letters and send you the tracing; could just paint it on. That will take a while as my boat is 150 miles away :-)