I have a custom pull out trash can unit in my kitchen, next to the sink. The front bin is standard size and the back one is smaller (about 6 3/4 by 9 1/2 and about 6 deep) -- we couldn't fit a second standard size there because of the disposal. Back bin holds a large roll of trash can liners. Looking for a replacement bin for this smaller bin -- Help???? It's probably about 6 quart capacity. Thanks!