We make the edges as thin as possible for best blending. Theres afew people now fitted these with good results. A bodyshop on this forum bought a set and ive had excellent comments/feedback from them and the people who have seen the conversion they did.
Metal panels are hard to find, you need to find a van or possibly a new/old stock panel which are hens teeth, you might find a single side but finding both is like winning the lottery.
There was a set of copy metal panels on here for sale recently.