I spent the last weekend repairing and installing locks at my dad's office. He also has this mini-fridge at his warehouse/office. It came without the key, and has always been unlocked. The lock is on the lower right corner:


As of recent, the drinks in the fridge are being depleted at an alarmingly fast rate, and he thinks some employees might occasionally be getting thirsty and fancying a Red Bull. So he asked me if I could make the lock functional again. I don't have the means to get blanks anymore (my locksmith got told off by his 'master' for selling me some) so I will probably have to pick and replace the lock.

Appears to be a 3-wafer lock, which should be easy, except I can't figure out how to take it off the frame of the fridge. Here is how it is mounted:

This is from beneath the frame. Towards the side closer to the insulation (the inner side) you can see the cam, which portrudes through a slot cut into the frame, and thereby prevents access into the fridge. From there, if you look forward towards the 'face' of the lock, there is a retaining tab of some sort. I assume I would have to remove the retaining tab with pliers, then pick the lock, but what to do after that I will have to figure out.
I tried to find a key that operates the lock, as I know most wafer lock keys are interchangeable but so far the blank sizes are all too big. I could try milling an appropriate blank and then impressioning the lock, but the only tools I have at my disposal are a Proxxon and hand files.
Installing a padlock onto the fridge is out of the question.
What would be the best approach? If anyone has any tips I would be grateful.