I'm sorry it took me so long to do this!

Here I have the Satchel prototype STL files. It's been so long now I don't remember which are the most up to date (though the dates might help). I never finished making the updates (which I would have needed test shots to continue refining). It's a little rough, but it is build-able. Do what you can. Use supports when printing. I takes small screws and 1.5- 2mm wire/pins

The screws can be found here, use the 6mm length.
https://www.albanycountyfasteners.com/Phillips-Pan-Head-Machine-Screw-M2-x-4-p/1066-1002.htm