mine was broken too; it had a hole in it when i bought it. so i went to a gas station near work and asked them to do an oil change and how much it would cost to replace the dipstick.
long story short, they pulled the dipstick out and cut it in half and then they told me it would cost $250 to replace it.
what a bunch of f**king a$$holes! they must rip off everyone who takes their car there!
anyway i told them that i would do it myself and got my car out of there as fast as possible. even though the ride back to work was less than a mile, the oil came out all over the place and it was smoking like crazy.
so i took the metro home that night and took the car very gently to my regular mechanic after topping the oil off and shoving the bottom half of the dipstick back in the hole as best i could. i must have looked like an idiot there under my car in the parking lot at work.
that was the first and last time i ever went to those bastards for anything, even gas.
so anyway, yeah, there's my little dipstick story