Easy, you can find replacement LED's a truck stops for a fraction of what you stated.
Being a Jeeper it is a common rear tailight conversion. Look up Stu Olson + Jeep and Stu will show ya a really good write up. I will include the link to the write up but you gotta check out my buddies site. He is also into mobile mapping and radio BIG TIME so you may pick up some ideas for boatin and fishin.
Let me know what ya think.....I hope I have saved ya some money and given ya some cool options
http://www.stu-offroad.com/otherwriteups/led/led-1.htm

Paul