Way back when I often found it easier to
build my own than rely upon the vary rare insteance I could find something to 1/2" = 1'-0" scale. Got my figurines - far too few of them, found them at some hobby shop but furniture... at best it's rare to find that scale. Perhaps easier now with the internet. Look towards who makes doll
house furniture and special order your 1/2" scale items that might be available but not stocked. If you have a local doll
house and or craft center, bring a scale rule with you and measure to see what's close. Or if they seem to specilize in doll
house stuff, chat with them for scale furniture.
Often normal doll
house furniture and stuff will be close enough at times - I know my sister's doll
house was never the same after I got into scene design/
stage model classes in school. Than again, neither was my brother's train set, scale grass and folliage in general can be downsized say a tree a bush, this much less both types of "raw materials" often were easy to modify to my purposes.
Still, time and
foam core, balsa wood and or green plant hoding foam plus a good
Exacto Knife set, and lots of jesso were often my best friends when it came to making furniture. Granted your fingers will no doubt never forgive you for the use of the
hot glue gun when not using Sobo glue. Further plaster or scenic dope, the scene shop
etc. if going the make your own stuff route, figure it takes as much or more time to do the model as to draft and sketch up the design. That's why white
etc. models are also a good concept. Them or 1/4" and 1/2"
foam core rough approximations at times.
Another option potentially available would be an architectural / drafting supply store. As a theory at least architects would while normally doing stuff in 1/4" scale and need furniture and people for such models, perhaps have suppliers that laso do 1/2" scale. Again a special order but an option.