Shylo,
I did just that:
I have had a discussion with the manager and he was very convincing about the security risk (apparently a rash of robberies in the area). Although I felt skeptical -I had to take him at face value and allow him his say (side of the story). He said it wasn't personal (about denying me my large sum of money) but an executive decision made at head office not to release/hold large quantities of cash. It really seemed a stretch to me (like business don't deposit large sums and are a bigger target than I). In hindsight I just wish I closed my savings account when I was first told this- but I thought I would give them due process to correct the situation (& I may close the account yet).
When the manager & I met, I showed him an old Charlton catalogue and some FPN/BPN of notes I've entered in the SNDB to convince him of my hobby and he said he'd look into it and see if he could get a waiver from head office. He asked that I write a letter (email) to explain my hobby/need to search bricks, etc and I complied. He did get back to me promptly and asked how much how often. I replied but haven't received an answer as of yet.
I do have 2 other banks I deal with but was hoping that I didn't have to go there since this branch is very convenient (& the teller staff friendly). I've spent a # of years building up a relationship with several of them. I've also banked with the 2 branches in my town for 35 years though I'm not sure that means anything to them these days (with record pop growth in my area & bank profits).