Every one wants a spare lenze 534 cos so many have fallen over . and lots of folks want a reserve. (I suspect this may be due to experimentation by inexpert CNC hobbyists like me)

I now have one of these https://www.sprint-electric.com/product/1220i/
although from the currents and voltages I see on my current 55w motor the 340i is more than capable .

I cant imagine that you would find a Lenze for a price cheaper than the new cost of the 1220i, it can be adjusted up to the 12.2 amps although I have mine running with I max lmit of 4 amps which I have never even approached .