[Collins] 75S3B info

[Don and Diana Cunningham]

I just got a very nice 75S3B in a S3 line today (73S3B, 32S3, 312B4, 516F2, 
30L1).  I am in the process of looking it over for obvious problems before 
"smoke testing", hi.  Under the filter cover on top of the chassis, I found 
some foam packing around the filter that is doing some serious 
decomposition, to the point that it will crumble mercilessly when touched!! 
Any reason to try to find/make a replacement foam for this??  If so, anyone 
have a spare before I start looking for some foam rubber to cut up?
Tks,
Don, WB5HAK