I would go aftermarket to get listening asap
then get lucky some day to find OEM, perhaps a transformer; a whole TT for parts; one nicer than yours, or with a nicer tonearm; then sell or use yours for parts, i.e. maintain flexibility in your future search.
You (or someone) can put a din connector on an after-market transformer if you know the wiring diagram.
IF the din connection is inside a fitting, make sure you know how LONG the din connector needs to stay small diameter inside the fitting, then they get wider. You could change both ends if that would help.
Voltage must be the same, you can get more capacity/watts, the TT/any device will only draw what it needs i.e. 60 watt lamp on a 15 amp circuit.
google search for 24v/500ma transformer