Legend Archery Arrows Telescopic Tube with Arrows Holder
You can extend this out to the size you need it for the arrows you have. It has a tight-fitting cap that won't let you down and this can easily fit into any archery backpack for convenient portability.
The closed size of this tube is 24" x 3" x 3", extend the length to more than 35". The foam holder will keep your 12 arrows separated, your long stabilizer can fit inside the middle tube with a maximum diameter of 1" (25mm).