If your bed isn't actually ruined (still heats) you might want to just add a surface on top of it. My CTC printer actually has an aluminum bed, but I print on picture frame glass that is mounted above it ($2 each at places like Lowes). The glass was easily thin enough to still be "adjusted for" with just the leveling screws at 3/16 glass.
I've lost "chips" out of my Da Vinci's boro glass myself, but it hasn't cracked yet. I just ignore the chips slight effect on the bottom of a part, if the part prints over it. Using a glue stick greatly decreases the chance of breaking the boro glass, while ABS slurry or even hairspray tends to increase the chance that you damage the glass.