Corbin Russwin Co. 1000-112-A01-6-L4 613 1-1/2 6-Pin Mortise Cylinder
and then order the Kaba Ilco Corbin Russwin cam part number Kaba Ilco 863S-00-10 Corbin Russwin/Best Cloverleaf Cam as seen here:
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You can also but a Schlage Cmp 20-013C 613 Mortise Cylinder as seen here:
and then the Schlage B520-233 Corbin Russwin Clover Cam for Classic Conventional Mortise Cylinders as seen here:
605, 606, 611, 612, 613, 613E, 618, 619, 622, 625, 626, 629, 630, 722, BSP, WSP