Bananabean - look top right for the start of the map; it sounds as if you've got the finish of the map; the penultimate element is horizontally very close to it - google an appropriate site and you'll find it.
I really enjoyed this but there's one bit I'm not sure of. I'm assuming the L shaped element is the ????? turn, but, it it's the one in the top left, then I've got an inverted L rather than a regular L - have I got it in the wrong place?