Found this today. Looks interesting
http://www.modelscenerysupplies.co.uk/model-fencing-and-walling/flexible-walling-00-and-n_96.aspx
Lovely stuff, i used them for my walls and hedges, just cut to size and glued to the base with a hot glue gun:
(http://i1236.photobucket.com/albums/ff441/petercooman123/DSC02559_zpsb9a29cee.jpg)
I bought a pkt of these years ago...still in pkt. Haven't actually found a good use for them yet.