well, i can't point to you to a source but I can offer encouragement. They DO exist in proper scale. I bought 3 from a vendor at York. Have no idea of the 'brand' though or where he got them.
I have seem them in some places but they are way oversized, including the JoAnn one's. At least in stores by me.
Again, somewhere the do exist. So have fun searching!
- walt