You might want to check out www.replacements.com -- if you click on "silver" you should then be able to find a listing for "International Silver." It's kind of time consuming to look at each pattern and they don't always have a picture of each one, but I was able to find my mom's silver on there.
Have fun polishing!
__________________
A hiney bird is a bird that flies in perfectly executed, concentric circles until it eventually flies up its own behind and poof! disappears forever....
-Ken Harrelson