[Mgs] Rear axle pinion thrust washer?

[Mark J Bradakis]

Being a Triumph sort of person, I'm not well versed in tracking down MGB 
parts.
Moss Motors lists the


267-900 THRUST WASHER, pinion .222"

as N/A, in any of the thicknesses.

Are there alternate sources for these items, or are we looking at custom 
fabrication?

Thanks,

mjb.