Thanks for the suggestion - sorry for the late reply.
I have tried that website 3 times.
At first it looked hopeful as they had manufacturers logos - but
clicking on the Castle logo does not get me anywhere - just a slowly
scrolling string of unconnected pictures.
By using the "search" button and searching for castle it only finds
one item :-
"Refoam kit for 2x 8 inch Castle drivers"
Which might be what I want - but no Model where used or dimensions
given.
How to lose customers before they even get them...
If time is not an issue you could bodge replace the rolls - I did a
pair of my own completely shot 8 1/2" drivers (the rolls were hanging in
tatters) about 12 years ago using Diamond tape as the impervious base
and strengthened with material for longevity - still going strong
without distortion (subjective!) but they are 100W drivers and I never
need to use them for anything more than about 20w and mostly at about
the 5w level! Took an evening each. C+