Yup. https://ceautoelectricsupply.com/battery-cable/ [SMD Members get 10% off - use Coupon code smd10 at checkout.]
We stock it in 8, 6, 4, 2, 1/0, and 2/0 AWG. Here is but one example.
2/0 AWG tinned OFC. 5,929 strands. Rope construction. BC-5W2 Marine compliant.
Yeah, but do we actually stock it? Yep. Those are 200 foot spools. We have a pallet of 'em in stock . . .