Apparently there are companies that make chains for 35” tires and larger.
Peerless seems to have a good selection.
Tirechain.com carries a bunch of them. Oddly they list them for 35x12.5R17 but not 35x12.5R15.
I might pick up a set once I get new tires. I’ve used them plenty of times on a 2wd and they make a huge difference. Even better than studded winter tires. And they help you stop, not just go.