Your best bet is to replace the entire lock(s). They're about $5 each at Home Depot, standard cabinet locks. If you look on the back of the replacement lock package, it will say which key # that particular lock is keyed for. Do enough digging and you can find enough locks using the same key to replace all five (?) locks and have them all use the same key. Might have to hit up more than one Home Depot to find that many.
I posted a pic of the proper replacement lock on this other thread here:
I wouldn't say that. I got my single wide for $150, and just last week I got a goggle case for $30. Will be modding it soon. Keep an eye open and some cash available. Its what I do. haha