Due to an accident, we have had to get a new front passenger seat
(specifically the seat back).  I have learned that the seat back comes
uncovered, and the leather is ordered separately and comes with all the
holes already made (such that, in very simple terms, you just slip the
leather on the back).  The body shop and upholstery shop doing the
repair has had difficulty with the size of holes through which the
headrest shafts enter.  Specifically, the holes on the leather are
slightly larger than the plastic covers that sit on top of the leather
and that adjust the headrest height such that you can see the edges of
the holes in the leather.  Even the local Honda dealer is at a loss for
why the leather holes are being exposed.

Can anyone please lend any advice, experience, help to this situation?
At this point, if the experts can figure it out, I don't know what to
do.  Thank you!