You know, I recall passing these kinds of decorations countless times in Home Depot and Sears but now, when I went to the respective websites, I couldn't find a single one to your specifications. It makes me wonder if they have done away with the whole "Rope light" design and now strictly make them with 'bulbs'. I would recommend that you head to your local stores and inquire about them. Some places, while they may not have them in stock, may order them for you.
"I have always thought of Christmas time, when it has come round, as a good time; a kind, forgiving, charitable time; the only time I know of, in the long calendar of the year, when men and women seem by one consent to open their shut-up hearts freely, and to think of people below them as if they really were fellow passengers to the grave, and not another race of creatures bound on other journeys." ~Charles Dickens