Whisper, 5 is lucky in Asian cultures. But there are other cultures that believe 8, or any number that uses an 8, is lucky. Could you just change the bad number to an 8? When I was in an Asian culture, the bicycle I was given had the number 1(x) on it. I told the man that it was an unlucky number for Westerners. He took out a Sharpie pen and changed the number to 18!