Are you going to war with your bow or something?
LOL.
I was thinking the same thing when I saw your post. Are you actually going to be carting those arrows around during practice or what?
If so, maybe a Vista style belt quiver might be worth checking into.
Something of this nature, but I still don'tthink you will find one that holds 4 dozen. Unless you buy one belt and a few actual quivers.
I just found the first link when I Googled "Vista quivers". There are other brands out there, just look for something that would suit your taste.
http://www.archerywarehouse.com/hipquiners.htm