lockers for not for profit group (Westvale, Waterloo)

We are on the lookout for lockers for a not-for-profit martial arts club. We've been involved with them for over a decade and they run an absolutely amazing program. There are no fees for members who can't afford it and so, there isn't much extra money. The money they do receive is by donation only and that money is used to pay for their monthly rent at a local church.
There are some members who would like to store their gear between classes, so I thought I would post to see if I could locate any lockers (the kind you'd find in a high school, i.e. 6 ft tall). I don't mind scrubbing/cleaning if they've seen better days. Thanks in advance for considering!