Wavy Siding

I have looked high and low, but can’t find high quality texture of this kind of siding

This might work for me

I’m affraid this is gonna tile real bad real fast, unless you have lots of densely spaced openings in your walls. And it will probably be quite labor intensive to get a decent displacement map out of this one also.
This can be modeled relatively fast actually, and you could tweak one of those sets of textures : Oak boards - CG-Source to achieve a result pretty similar to the example you posted.

I was able to find a texture. It’s the first house on the Park City series over on the Image Upload section.