Fun, I just (6 hours ago) got an NMR instrument rack in as scrap. In the bottom of the rack is a power supply for the magnet that can deliver +/- 10V and up to 100A, I'm going to see if it can be converted into an electrolysis power supply.
It's not Bruker but an Oxford Instruments NMR, so I can't give you any advice about your instrument.
Göran