is this what you are referring to?
If so, we too needed these however they were awfully expensive anywhere we looked ($25-$35 for a pack of 5 without shipping). So we were able to actually make them by replacing middle piece in this photo:
with a small bracket I made using a hand drill and file. now all we have to do is buy masterlinks ($1 a piece where we are) and make a piece of sheet metal with a flange to make a $6-$7 part.