Trying to make a rucksack, using an old rucksack as a pattern. The old rucksack used what I think is called a Two Way Closed End Zip. The kind where when the zip is closed both zippers are in the middle, and when it's open they are at the ends.
Now I can find loads of zips with single zippers, and loads where the zip is open when the zippers are in the middle, but barely any of the type I need! All the ones I have found are the wrong length. I need it to be around 23", could possibly deal with 22" or 24".
I'm hoping someone knows where to find them! Otherwise I may just have to go with a single zipper, which would obviously work, but not be ideal.