I'm thinking of replacing a few lampshades on a half dozen tablelamps I have. My problem is the holder i.e. the part that slips down over the bulb holder and then is secured with a ring, is bigger than the norm. All the lampshades I've looked at have a small holder. Could anyone suggest somewhere to look as all the regular places like Woodies don't have any suitable. The shades are a sort of parchment & are coolie hat shape and I would like to get similar ones.