Need Tilesets for my game.

Hello, I am the owner of the company Dragon Lair Games LTD. I am working on a metroidvania game by the name A Kobold's Journey. I currently have a programmer, Level designer, and sprite artist. I am currently in the market for a tileset artist to make specialized tilesets for the game. The game is being made in Unity and will be sold commercially. I have a GDD which I will share upon request. It will show the general layout of the first two levels and I should have Sprites for reference of the art style for the characters. I am open for negotiation for the price. Would prefer to pay out from the games sales, or from the crowdfunding, when that's put up. But I am open to paying individually for each tileset.