i can't get my bike unlocked. here's how this happened.

so, when i bought my lock, the store only carried master u-locks (i know, ****ty store). i'm not sure if the lock is crap, but the keys sure suck. i broke one off in the lock before while unlocking. it was unlocking the bike, so i just had to take the little part out.

today i broke the second while locking up before work. i can get the piece out with tweezers, i guess. i wanna try picking the lock because i want to replace it (with a different brand if i can) and no one i know has bolt cutters and i can't afford a locksmith. if i can't pick it, i don't know what to do...go to a bike shop and try to find one of the same?

i'm sort of at a loss...any suggestions?