WTB steering rack inner "buttons"

Seen here: http://ift.tt/1cXhiHy



The white-ish plastic "buttons" are what we need to replace in a steering rack.



Measurements:

.804" wide

.283" shoulder height

.310" peg on the inside that slips into the preload spring.



Outside has a radius that matches the ball end of the tie rod stud.



Any ideas where to source these?



Thanks- Lawrence