AFV Drawings Needed

Does anyone know of a source of line drawings of armoured fighting vehicles?

The best possible vehicles would be those from Ground Zero Games resin line,
such as the GEV APCs, etc.

The next best would be science fiction AFVs.

Failing that, I will take modern AFVs, such as LAVs, Leopard tanks, Bradleys,
Marders, etc.

What I need is a line drawing as seen from above. I will consider line
drawings from other perspectives, however.

This is for a project that I am working on with regard to SG2. I will post the
results of this project pretty soon.