Arm for SOTA?

A friend has a SOTA Star vacuum table in good condition but he has not been able to get his Zeta arm repaired. What arms work well on this table in members systems? I thought possibly one of the Jelco arms would fit the same cut out as the Zeta, which was the same as the Rega, Ittok, FR and others. I have not used any of their arms and my last SOTA was so long ago I can't remember what arm was on it so practical experience is appreciated.