Eight of the houses, two carts, a stall, a fountain, a trebuchet and and a bunch of smaller objects are offered for free through Turbosquid:
http://www.turbosquid.com/Search/Index.cfm?INTFILETYPE_3=0&INTFILETYPE_2=0&BLSHOWCATEGORYSELECT=false&BLSEARCHGAMEREADYONLY=FALSE&ISTSEARCHKEY=&INTFILETYPE_1=0&INTMINPRICE=&INTCATEGORY=-1&BLKEEPCHECK=n&INTBUNDLEID=&ISTINCAUTHOR=Sven+Daennart+Medievalworlds&ISTEXCAUTHOR=&INTRATINGCOUNT=0&FUSEACTION=ProcessSmartSearch&FLTRATING=0&DATEBEFOREPUB=&INTMEDIATYPE=-1&STGBOOLEAN=L&INTMAXPRICE=&STGTYPE=&DATEAFTERPUB=&INTSTARTROW=1&ISTEXCKEY=&BLAUTHOREXACT=y&stgAD=15J244404040441&stgOrderColumn=A5&intSortOrder=1&blViewType=1&intMaxResults=200
The other houses (and combination packs) are paid downloads, and can be obtained seperately.
http://www.turbosquid.com/Search/Index.cfm?INTFILETYPE_3=0&INTFILETYPE_2=0&BLSHOWCATEGORYSELECT=false&BLSEARCHGAMEREADYONLY=FALSE&ISTSEARCHKEY=&INTFILETYPE_1=0&INTMINPRICE=&INTCATEGORY=-1&BLKEEPCHECK=n&INTBUNDLEID=&ISTINCAUTHOR=Sven+Daennart+Medievalworlds&ISTEXCAUTHOR=&INTRATINGCOUNT=0&FUSEACTION=ProcessSmartSearch&FLTRATING=0&DATEBEFOREPUB=&INTMEDIATYPE=-1&STGBOOLEAN=L&INTMAXPRICE=&STGTYPE=&DATEAFTERPUB=&INTSTARTROW=1&ISTEXCKEY=&BLAUTHOREXACT=y&stgAD=15J244404040441&stgOrderColumn=A5&intSortOrder=1&blViewType=1&intMaxResults=200
The other houses (and combination packs) are paid downloads, and can be obtained seperately.