Texturemate should be compatible, no ?
From their homepage:
Quote: "At texturemate, you will find my completely original texture photographs, texture packs, stock images, brush packs, or any other resource I manage to create and share for you. Here, you are allowed to obtain anything for free for commercial or non-commercial use! All stock texture photographs have been taken by myself and are available in resolutions of 10 Megapixels or higher. There are no paid subscriptions or fees required to obtain any texture or brush here."