So after some searching I ended up with a UDM carbon aero post . £40
slight difference in shape but still tear drop . Had to file the paint off the old post to make it snugly fit .
packed the new post bottom inners with tissue and wedged down the old post First dipped in resin .
should have taped up the top of the old post as when I was filling the resin inbetween the 2 posts it started to rise up inside the old post aswell . Maybe just start small and let the resin dry first then fill the gaps .
works fine have my bike back