I need some Amsoil 80W-140 gear lube and they do not list any in qts. anymore on their site. The smallest container is a 5 gal. bucket. Does anyone know what's going on and how I might get some in quarts? I'm not ready to spend $106. 50 when I need only 5 qts. I see they now have a new lube (Long Life Gear Lube) and no longer list the series 2000 stuff. I am currently running the series 2000 75w-90 but I am getting ready to start RV transport so need to go to the heavier oil. Thanks - Mark