Via the Tool Shed I couldn't see the import workflow action... from
memory it was on the broken SVG page?

These are not tweaked - it is an old workflow created with manually
installed tools which therefore have the short form identifiers. This
is something Galaxy may need to continue to support for backwards
compatibility with old workflows supplied as supplementary files etc.

I'm attempting to update the workflow to use the new long-form
toolshed identifiers (although this has the minor downside of no
longer being portable between different Tool Sheds).