[R-390] Amp 9 pin PTO connector R-390A, R-392 Needed

[Craig Anderson Ext 1365]

Does anyone know of a source for the blue hexagon locking connector
(male & female) used for the power connection to the R0390A and R-392
PTO's.  I'm trying to make up an extension cable so that I can work on
the PTO on the bench. 

 

W9CLA