Not sure if this is the place but I did DIY it. Building a Titi for fun and wanted a safety feature other than friction and hopes and dreams holding the screen in place. Just used a piece of 18g titanium wire I had and put two bends in it. I can still take the top basket off with a little finesse but the bottom basket can only move a tiny bit in worse case scenario (as shown in last picture). Waiting on a coil to get here to set it up. Hopefully the link works.