Wellcraft decals

Thought those price stickers stores put on items were hard to remove. Boy, was I wrong. The wellcraft decals have been on the boat for 29 years and never budged. Is there a simple way to remove them? Have been using a razor blade scraper. A slow process, plus it leaves all the glue on the hull.
Next question, where can I get new decals? Don't tell me that I was suppose to keep the old ones.