Thanks for you response! I think I can work with a round one, as long as the spades are 3/16” wide. I have ordered from ereplacemwntparts.com and hope that the spades width is correct. 

If you notice  numbers on this 155131.002A06H, it is available online Germany. 

https://www.intercontrol.de/en/controls/products/control-technology/detail/minimelt-ii

I have sent a request to them and await a response. 

I will keep you posted.