I can hardly think of a worse thing than a bleed kit to lend out from a library. They're full of small parts to lose, and they'll never be clean once you use them. And you don't want people mixing up the DOT and mineral oil bleed kits.

I have worked in a bike shop as a mechanic, and we periodically ended up misplacing the various adapters. This is in a place where everybody using the kit is getting paid to do the job and has been trained. The librarians would go nuts just replacing O-rings and adapters that people had lost.

If you need one for your specific bike, you're probably as well off just buying the one you need from e.g. bleedzone.com [0]. Most of them are around or under $25, and if it's your kit, you always know who the last idiot to use it was :-)

[0] I haven't bought from them, but probably will when I need one. The shop I worked in has sadly closed.