[TR] Steering Column Blanking Plate

[wbeech]

I called TRF to order some grommets and found they had a gasket for the
right-side steering column hole (my '58 is LHD).  I was told there is a part
number for the blanking plate: 601962 but they do not and have never had
them.  Then I called MM and was told the part number for the gasket: 603346
is a solid piece and serves as the blanking plate.
 
So, who is correct? If TRF is right are they any suggestions as to where I
may get this plate?  If MM is correct then why do I have two holes with
threaded spring-clips on either side of the hole in my firewall (maybe a DIY
from the PO?)
 
TeriAnn has a very nice firewall grommet diagram for the post-60,000 TR3s on
her site, does such a diagram exist for the pre-60,000 units as well?
 
 
Thanks to all,
 
Bill B
'58 TR-3A TS/30766 L
'59 TR-3A TS/64974 LO
"A Triumph is man's best friend, it always comes when it is called...of
course, some times it is difficult to make it go"