JEGS sells them, and likely any tractor supply place .... I happen to be fortunate to have
a place here in town that has, or can get, anything in the way of DC electrical supplies and hardware of all descriptions, they've been invaluable for my bus project
Deve, yer not paying attention, I linked 2 ga straps, and a place that has 1/0 and heavier, any of which are available where I live .... and you won't be pulling the ends off, I don't accept defective merchandise
Bill