I think they may even sell stick on comb pads that thick?
You could buy a kydex comb riser, but you'd have to drill holes in your stock. Though recently I bought one with the intention of "gluing" it to a stock, with a herder silicone like adhesive, so I could remove it if need be. But once I started the idiot light went on and I realized I wouldn't be able to get the bolt out. lol
https://matthewsfabrication.com/product/adjustable-kydex-cheek-rest/