Donate to the Lead Adventure Forum to keep it alive!
There's a pretty big version you can download here: http://www.mediafire.com/file/vu066kp92mqbc5x/northymbra-map.pngHopefully that'll do the job, but if you need it bigger, let me know and I'll see what I can find...
I like the idea for the thatching. I may have to give it a try sometime as a change from tiles/slate.