where can i find a Virgin Mary money bank?

A group that goes to peoples houses to pray the rosary carries a tin can with the virgin mary cover on it. They use it for donations that they use to buy flower offerings, rosaries and such things to help along with their voluntary free service. Ive been looking for a virgin mary money bank to donate to them, but i have not been able to find any. Id like to get one that is of good quality and, if possible, that can be locked and reused. Thanks for any help.