Parker dealers sell the decals in the small and large size, like that worn on the rear of the hull side. They also sell the even smaller model numbers that go around the helm cabin on SCs. See your dealer.
Remember that TomS here makes boat names and hailports in a Parker-like font and can provide you with a graphic ready file your local decal shop can produce. He can also steer you towards a few grpahic houses that do great work at even greater pricing.