Fire proof enchantment book

So badicly i was think its realy annoying when you die in lava and all your valuble items (armour and swords) so i was thinking an enchanting book called fire proof or something like that to stop it burning for example if i was strip mining and i fell into lava the gear would survive and you can just go and pick it back up (if it hasnt (despawned) and what about the falling to the bottem u may ask yourself i was then thinking this enchantment makes it float as well but if it hasnt got it it will not float and if u could find it in a dungeon with zombies or spiders or skelitons i was thinking the spawn rate could be about a 2.5% chance of it spawning there