Hi Slotshot,

Yes there is. There are specific one that spray a rectangle pattern with the head in the middle or on the sides. Look at the pattern shapes on the store display or containers. All the major brands carry them. The local nurseries, irrigation stores or big box stores have them. Match the brand of your sprinkler head body and all you have to do is unscrew the old head and screw on the new one. Replace the little filter part under the head, a new head will come with a new filter. Adjust the spray distance by adjusting the center little screw. Clockwise is less. That is about it. Gl Aloha.

If you are looking for a nozzle to replace the ones there that will cover an area of 1.5' wide and 20' long per nozzle, you wont find one. None of the major brands make it. I would suggest grabbing the largest throwing nozzle called and end strip (1.5' wide x 15' long) and replacing the screen and nozzle per lehua13's suggestion. If you want it perfectly covered, you will need that portion of your system torn up and redesigned. I suggest doing your part to stimulate the economy and hiring a reputable sprinkler tech to take a look at the feasibilty of it.

Yes, while there are "strip" sprinkler heads, the narrowest area I've ever seen one of them cover is 4 feet wide.