Thanks MOB.
Velcroe was my initial thought, and I have PLENTY!
Can't say as I have any spare pieces of Neoprene laying about, however.
Might have to get online and search for some. Although, I'm not going to go SO cheap, that i'm strapping
one of those Stadium cushions to my top case. I have my limits on going cheap. 
gr
I checked McMaster Carr... all the stuff they have had "Gold" prices...
and huge size beyound what you need..
Closed cell foam is what you need, and the most common is Polyethylene, the stuff used for slip on water pipe insulation, and swimming pool toys "snakes", and such..
The stuff I had was closed cell Neoprene, and EPDM, both, and it's expensive... but it was scraps, so free....
check the phonebook for local foam rubber distributors, or people that are secondary users of the stuff, like places that do custom box and case inserts and such...
all ya really need is a piece 1" x 4" x 14", and they would toss something like that in the scrap bin, or if you bought it from them would give it to ya for $1...
This place is local to me, right by the house, went to school with the head of sales...
https://www.americanfoamproducts.com/materials/Don't know what color, or what is in stock, but it would cost more in postage than the material cost is..
He sold me a piece of High density memory foam, 6" thk x 6 ft long x 40+" wide, for $20...
and even better, it was in Cleveland Browns Orange color... which was a bonus, as it was for my Crate and Barrel wooden porch settee...
