Seamless hair textures with alpha/fringe?

I've looked on the marketplace here and in world at some places, and I can't seem to find the right hair textures to use for my hair creating.

I am a little afraid to buy more hair textures unless I can see a demo of them or if I can buy a single color to test.

Does anyone know where I can find good quality hair textures in as many colors as possible that are seamless and with the alpha/fringe textures and are full perms?

Thanks for reading.