Brick Textures

I am in need of a number of brick, cinder block and roofing materials for buildings and haven't been able to find a large number of them outside of the basic lis surface pack that i downloaded. I was hoping someone could direct me to more that I could use.

Also, I don't currently have photoshop and was wondering what the best way to create my own exterior building material textures would be. More specifically how to change the texture to reflect the differences in grout v. brick and also the texture of the bricks themself and also how to best create the 3d texture for roof materials (standing seam, shingles, etc)

Best is to buy some from different sources. I like www.3drender.co.uk (brick, roofs, landscaping, etc.).

You can also try the Acme Brick Masonry Designer-- http://www.acmebrick.com/md/index.htm

Try this
u can use google translate...

Or try here, an amazing free resource for an astounding number of textures:
http://www.cgtextures.com/