Free header flange slant 6 and T3 flange for dfx file

I've got a dwg of the header flange I saved from years ago. Not sure where I got it (slantsix.org?).

I was going to square it up some, the lines aren't quite true or parallel, but never got around to it and don't have any plans to. Anyone that wants the dwg file, or a dxf, I can send it (too big to attach), but I don't have the time to verify anything or fix stuff that might be found to be wrong.