[Imports] DWG files? DXF Files?

[jamesmikedupont at googlemail.com]

Hi there,
I would like to start collecting DWG and DXF files from autocad to
create a test suite for importing.

I would like to have DWG files in all the major autocad release
formats since 2000.

For each of them, would like to have a dxf file as well.

Ideally we would have test cases that produce these files, meaning we
have a set of geometric objects and for each of them a test case.

Does anyone have autocad and want to help with this?
thanks
mike