I could not find any at the chain craft stores or local hobby shops
where I live, I can't speak for cleveland, try team ohio if this
gets overlooked.
A tip while trimming the foam if it starts to cling to you
grab a fabric softening sheet if you use them and rub it over the foam
a few times and wipe your hands with it as well.
It will cut down on the static. I did not use pick&pluck so I don't know
if it will do that or not. I used some foam blocks I had here and hacked it up.
So I had slivers of foam clinging all over the place