The PHILCO Phorum

I have noticed an issue with the 116X I recently purchased. The gum rubber used to link the cone to the frame on the clarifiers has deteriorated to the point that only a sliver is left on each of them. 

I know that those used to be reproduced by someone 20 years ago... but I cannot find any reference anymore.

What have people used to replace those?

This is the only thing I've seen about it  https://www.youtube.com/watch?v=Y42KmweyhMM
Don't think that there is any definitive measurement of how effective this approach is.

If it makes buzzing noise - just remove it.
From what I red, they I not awfully effective anyway.

Here's an earlier thread (and YouTube video link) on replacing with silicone bands:

https://philcoradio.com/phorum/showthread.php?tid=7408