Hate when that happens but I usually keep a few extras about.
It happened at the absolute worst possible time it could have happened too (down to about the minute). I have the paper cash to buy a new one, but it happened just before my bank in the area closed, so no way to run over there and deposit it, so can't even place the order Friday, or the entire weekend, so I have to deposit it on Monday, and order it Monday night, and have it next-dayed in, which would technically be Wednsday, because they won't ship it out after 4:00, and I can't order it until about 7:00... I'm not even going to considering waiting on the RMA, my broken one will become my spare/ASIC driver.
It sucks real hard too, as my mom went to walmart today, and I had her take my cash to put it onto a prepaid card, except: "We don't carry these anymore since Christmas because of all the fraud going on." FUCK YOU walmart.