I've been busy and not have the need to order any items from my Supplier in England.
I was shopping for parts recently and saw this:

Vortex Air Cleaner Plate, fits many CAT MODELS
Hole Centers 4 1/32" *1/8 Holes.
Oven Baked Black Enamel, Oven Baked Special Clear Coating. Will never need to be polished.
Clear Film Covering over the plate, Extra Protection, Keep on or peel off.*
$15.00 USD each + Shipping

Instruction Plate. 3459-A
Used on: Cat 60, Earlier Models *Copied from 4403A SIXTY 1928
Hole Centers 5 9/16" x 14 27/32"
Oven Baked Black Enamel, Oven Baked Special Clear Coating. Will never need to be polished.
Clear Film Covering over the plate, Extra Protection, Keep on or peel off.*
$80.00 USD each + Shipping
*
These are just a couple I noticed, there are many other plates are available

!

Do you have a link??

I'll send you a PM on your ACMOC email.