Here we go! This one was definitely a challenge (mostly the huge size), but it's done! Full image (I recommend this, much better detail, in-game level. 11,744x10,711 360mb): http://xf2m.com/serpentshold.bmp (again, 360mb, careful clicking, your browser may not like it!) And the preview (2268x2070): Area highlighted on map: http://i.imgur.com/u1TNRqR.png
This is awesome... love me some Serps! There's still a villa spot available in the southeast too (though you'll have to watch out for that silver serpent).
There was an L-shape but whoever bought it replaced it for some reason, Good luck putting an L-shape now.