[R-390] Need Detent Spring for R-390 (not -A)

[Ray Murray]

I need a "Detent Spring for the MC portion of the gear train on my R-390 
(not A). 

My Service Manual TM-11-5820-357-35 Shows on Page 85, 
The Index No. (part number) is "60" 

It attaches with two phillips head screws to the "RF Subchassis Rear 
Plate" bottom right hand corner near the MC knob shaft. 

The spring portion is broken off but the mounting tab remains. 

It is 1 1/4 inches wide and the mounting holes are 7/8 inch center to 
center. 

Can anyone help with this part or know someone who can? 

Ray