who can convert this sketchup for me step,iges. IV.SW

Not certain these will work for whatever you are planning, but give them a try.
The skp file is junk and required a lot of repairs. Part of the lid/seat was lost, I was not able to fix that piece.

I'd normally import these into something that will wrap a surface around the meshes to form a marginally useful step file, but these files won't import as a mesh. I just get a very sparse point cloud (likely from the vertices).

These are simply stl files imported into SW, then saved as SW files. They are very faceted, but maybe they can be useful for rebuilding a better model?
I thought the library had some really nice toilets already in SW format.

Also attached some step files and an image.