Your best bet for that dress would be to make it yourself. Puffy sleeves like that are quite uncommon, though it is not hard to find patterns for them. That apron is very simple- you should be able to find something close to it in any place that sells cooking supplies. The color might be trickier- perhaps you can buy a white one and dye it?
Depending on your height, you might be able to find a wig of suitable length from witchwigs
. However, if you can't find the color you want in a long enough length, try amphigory
, although they have very slow shipping.