it seems that the agm battery in my k4 has finally given up the ghost (4 years, 8 months old) and i need a new one now. does anyone know of a place where i can get cheap (inexpensive ones?) i went to the interstate battery store here in town but theyre selling for 85 dollar and change there. i dont want to go to a lead acid battery, really wanting to stay with the agm. any suggestions? the battery box thats in the k4 now has actually been modified to take the next size larger battery but i also have a battery box from my 750 f0 i can use as well.