Has anyone found a suitable transformer to hard wire the D235 doorbell to mains wiring. 
My existing doorbell chime is insufficient and so I want to replace this with a suitable transformer. 
 

Im aware of the spec requirements, but wondering if anyone has actually bought one and is successfully running their Camera in Always on mode. 
I'd prefer if it was a unit I could mount above the door in place of the existing chime rather than DIN mount as the existing bell isn't on its own circuit.