My mate found these this week in the UK
http://stores.ebay.co.uk/Arcane-Scenery-and-Models/MDF-Buildings-Sarrissa-/_i.html?_fsub=2337785013&_sid=29047263&_trksid=p4634.c0.m322
Look pretty good, all slot fit and flat pack, apparently they look good with just a wash.
Slightly cheaper on ebay. THe official site screws with my computer