I don't like calamari. I thought you cooked your inner tubes.
Check out automotive belts, small equipment belts with the rounded teeth or visit the local auto repair shop for old belts. Some timing belts are narrow and not too thick.
Nice dozer. I have purchased a small fleet without even thinking about it. I didn't know I liked heavy equipment that much, but I guess I do now. They do look good around railroads and as loads.