Have you tried the New Swanneck pen for Left-Handers on Amazon?

A British company has invented the revolutionary Swanneck Pen, which was specifically designed to make writing simple and smooth for all. With extensive research we have found the swanneck pen is just as effective for millions of right-handers writing in Arabic or other ‘right-to left’ languages used thought-out Asia and the Middle East, The design has a worldwide patent and is design registered.
the Swanneck Pen is an extremely simple design, which incorporates a patented and design registered S bend neck and ergonomic grip, which makes it easy for Writers to pick up and write comfortably, straight away whatever their language or written text .